Nursing TEAS Exam SIDK

the sum in math means

+

Which of the following options represents the shape of red blood cells? A. Columnar B. Discoid C. Cuboidal D. Fusiform

Discoid

Which of the following words is spelled correctly? A. Guidance B. Guideence C. Guideance D. Guidence

Guidance

In which stage of mitosis does cytokinesis become complete? A. Metaphase B. Telophase C. Anaphase D. Prophase

Telophase

Which of the following is a lower leg bone that bears the majority of the body's weight? A. Fibula B. Femur C. Talus D. Tibia

Tibia

A control variable is

the object that is kept constant during the study.

If the radius of a circle is 12.5 inches, what is the diameter of the circle? A. 37.5 inches B. 6.25 inches C. 50 inches D. 25 inches

Correct answer: 25 inches The diameter of a circle is twice the length of the radius. Multiply 12.5 by 2 to find the diameter. 12.5 inches × 2 = 25 inches

If the temperature in a room is 12 degrees Celsius, what is it in Fahrenheit? A. 65.3 B. 36.8 C. 59.2 D. 53.6

Correct answer: 53.6 The formula for converting Celsius to Fahrenheit is: Temperature in Celsius x 9/5 + 32. 12 x 9/5 + 32 = 53.6 degrees Fahrenheit

ounces in a pound

16 ounces

Every triangle contains ____ degrees.

180

Divide 32 liters by 80 cubic centimeters. A. 40 cubic centimeters B. 40,000 cubic centimeters C. 4,000 cubic centimeters D. 400 cubic centimeters

400 cubic centimeters

Shows 0.0996 in scientific notation

9.96 × 10⁻²

Which of the following is a controlled independent variable used during research? A. Experiment B. Treatment C. Data D. Factor

A factor is a controlled independent variable used during research. Experiment is incorrect because it is when a treatment is deliberately imposed on a group of objects in order to observe the response. Treatment is incorrect because it is something that is administered on or to experimental objects. Data is incorrect because it is a collection of responses from an imposed treatment on a group of objects.

Which of the following words is spelled correctly? A. Acomodate B. Accommodate C. Accommidate D. Accomodate

Accommodate

Michael bought a tray of eggs for $4.50. Six of the eggs broke and Michael sold the remaining eggs, making a loss of 20% from his initial investment. If the tray has 30 eggs, what was the selling price of each egg? A. $0.12 B. $0.15 C. $0.18 D. $0.23

Correct answer: $0.15 We consider 30 eggs to be 100% of the amount Michael bought. Six, or 20%, of the eggs broke, leaving Michael with 24 eggs, or 80%. Find 80% of the original cost. 80/100 × $4.50 = $3.60 To find the selling price of each egg, divide the total selling price by the number of eggs sold. 3.6 ÷ 24 = $0.15

Elizabeth works 12 hours per week and earns $10.50 per hour. 20% of her paycheck is taken for taxes and other withholdings. How much money does Elizabeth take home in a two-week period? A. $252.00 B. $126.00 C. $201.60 D. $100.80

Correct answer: $201.60 First, calculate how much Elizabeth makes per week: $10.50 per hour × 12 hours = $126 per week Next, multiply that by 20% to account for withholdings. $126 × 20% $126 × 0.20 = $25.20 (weekly withholding) Subtract withholdings from her weekly earnings. $126 - $25.20 = $100.80 To find her income for two weeks, multiply by 2. $100.80 × 2 = $201.60

A trader made a profit of 15% on selling a 30-gallon plastic tank at $400. What was the original cost of the tank? A. $460 B. $471 C. $340 D. $348

Correct answer: $348 The trader made a 15% profit and sold the tank for $400. First, convert 15% to a decimal. 15% = 15/100 = 0.15 Set up an equation to find the original cost of the tank, x. $400 = x + 0.15x $400 = 1.15x x = $400/1.15 x = $347.83 ≈ $348

Meghan raised funds for the Cancer Society for seven straight days. She raised the following amounts: $525, $350, $275, $630, $1,010, $275, and x. What would the value of x equal if the average funds collected were $500? A. $595 B. $435 C. $480 D. $375

Correct answer: $435 If the average is $500, then ($525 + $350 + $275 + $630 + $1,010 + $275 + x) ÷ 7 = $500. Solve for x. ($3,065 + x) ÷ 7 = $500 $3,065 + x = 7 × $500 = $3,500 x = $3,500 - $3,065 = $435

Josh wants to buy 725g of walnuts Suppose walnuts cost $12/kg in the bulk food section. How much money will Josh need to buy the walnuts? A. $8.70 B. $8.40 C. $9.20 D. $7.90

Correct answer: $8.70 1 kg = 1,000 g, so we can set up a proportion to find out how many kg are equal to 725g. 1/1000 = x/725 1000x = 725 x = 0.725 Let's set up another proportion to find out how much 0.725 kg of walnuts costs. $12/1kg = x/0.725kg $12 × 0.725kg = x $8.70 = x

A shoe shop has two similarly designed shoes with different levels of quality. The price of the expensive shoe is $12 less than three times that of the cheaper one. Given that the total cost of the shoes is $308, determine the price of the cheaper shoe. A. $75 B. $80 C. $85 D. $90

Correct answer: $80 Let the price of the cheaper shoe be x. Since the price of the more expensive shoe is $12 less than three times the cheaper shoe, this can be represented by 3x - 12. The total cost of the shoes is 308, so set up an equation to find the price of the cheaper shoe, x. x + (3x - 12) = 308 4x - 12 = 308 4x = 320 x = $80

The cost of a 7.1" laptop is $960. If this amount includes 16% tax, what is the cost of the laptop before tax? A. $695 B. $614 C. $806 D. $828

Correct answer: $828 $960 is the actual cost of the computer, x, plus 16% tax. Therefore, 960 = x + .16x 960 = 1.16x x = 960/1.16 x = $827.59, or about $828 The amount $960 ≅ 100% + 16% = 116% The actual cost ≅ 100% ≅ 100/116 × 960 = $828

If hydrogen is in a compound, what would its oxidation number be? A. 0 B. +1 C. -1 D. -2

Correct answer: +1 If hydrogen is in a compound, its oxidation number would be +1. If oxygen is in a compound, its oxidation number would be -2. The oxidation number of an elemental atom is 0.

The price of a 20" television changed from $450 to $400. Find the percentage change in price. A. -10% B. -11% C. -13% D. -15%

Correct answer: -11% Change in price: 450 - 400 = 50 To determine the percentage change, divide the change in price by the initial price: 50 = 0.1111 450 Multiply by 100 to determine the percentage: 0.1111 × 100 = 11.11% Because the price decreased, the change in price is negative: -11.11%, or about -11%

Find the value of x given that: |12 - 7x| < 23 A. x > 5 and x > 11/7 B. 5 > x > -11/7 C. x > 5 and x < -11/7 D. -11/7 < x < 5

Correct answer: -11/7 < x < 5 Absolute value indicates the distance from zero, so the answer can be positive or negative. Therefore, |12 - 7x| < 23 means 12 - 7x > -23 and 12 - 7x < 23. Solve the first inequality. 12 - 7x > -23 - 7x > - 23 - 12 - 7x > -35 Dividing by -7 changes the direction of the inequality sign, thus x < 5. x < 5 Solve the second inequality. 12 - 7x < 23 - 7x < 23 - 12 - 7x < 11 Dividing by -7 changes the direction of the inequality sign, thus x > -11/7. Therefore, -11/7 < x < 5.

If oxygen is in a compound, what would its oxidation number be? A. 0 B. +1 C. +2 D. -2

Correct answer: -2 If oxygen is in a compound, its oxidation number would be -2. If hydrogen is in a compound, its oxidation number would be +1. The oxidation number of an elemental atom is 0.

Simplify: 1/2 - 5/6 • (3/4 ÷ 3/8 + 1/3) - 2/3 A. -2 1/9 B. -8/9 C. -1 5/102 D. -1 1/2

Correct answer: -2 1/9 Use PEMDAS (Parentheses, Exponents, Multiplication and Division, and Addition and Subtraction) to follow the appropriate order of operations. 1/2 - 5/6 × (3/4 ÷ 3/8 + 1/3) - 2/3 Solve within the parentheses first: 1/2 - 5/6 × (3/4 × 8/3 + 1/3) - 2/3 1/2 - 5/6 × (24/12 + 1/3) - 2/3 1/2 - 5/6 × (24/12 + 4/12) - 2/3 1/2 - 5/6 × 28/12 - 2/3 1/2 - 5/6 × 7/3 - 2/3 Next, solve the multiplication portion. 1/2 - (5/6 × 7/3) - 2/3 1/2 - 35/18 - 2/3 Change all denominators to 18. 9/18 - 35/18 - 12/18 -38/18 = -2 2/18 Reduce the fraction to lowest terms. -2 2/18 = -2 1/9

What is the value of a when |a + 6| = 3? A. 3, 9 B. -3, -9 C. 3, -9 D. -3, 9

Correct answer: -3, -9 The absolute value of a number may be thought of as its distance from zero. Therefore, the value of any number within the bars of absolute value can have either a negative or positive solution. If we remove the bars from the equation, we have two possible solutions, a + 6 = 3 and a + 6 = -3. Let's solve each equation. a + 6 = 3 a = 3 - 6 a = -3 Let's solve the second equation. a + 6 = -3 a = -3 - 6 a = -9 Therefore, the two possible answers are -3 and -9.

Determine the product of (2x/3 - 4/5) and (3/5 - x/2). A. x²/3 + 12/25 B. -x²/3 + 4x/5 - 12/25 C. -x²/6 + 4x/5 - 12/25 D. x²/3 - 12/25

Correct answer: -x²/3 + 4x/5 - 12/25 The product of two numbers is the result of multiplying them together. (2x/3 - 4/5)(3/5 - x/2) Use FOIL (First, Outside, Inside, Last) to determine the order of operations when multiplying expressions in parentheses. (2x/3)(3/5) + (- x/2)(2x/3) + (- 4/5)(3/5) + (- 4/5)(- x/2) 6x/15 - 2x²/6 - 12/25 + 4x/10 Remember to group like terms and find a common denominator. - 2x²/6 + (4x/10 + 6x/15) - 12/25 4x/10 + 6x/15 = (4x/10)(3/3) + (6x/15)(2/2) = 12x/30 + 12x/30 = 24x/30 Simplify by dividing the numerator and denominator by 6. 24x/30 ÷ 6/6 = 4x/5 Simplify - 2x²/6 by dividing the numerator and denominator by 2. - 2x²/6 ÷ 2/2 = -x²/3 Therefore, the answer is -x²/3 + 4x/5 - 12/25.

What is the oxidation number of an elemental atom? A. 0 B. +1 C. +2 D. -2

Correct answer: 0 The oxidation number of an elemental atom is 0. If oxygen is in a compound, its oxidation number would be -2. If hydrogen is in a compound, its oxidation number would be +1.

How many liters are in 1 milliliter? A. 0.001 liters B. 0.01 liters C. 0.1 liters D. 10 liters

Correct answer: 0.001 liters There are 0.001 liters in 1 milliliter. The prefix milli- means one thousandth, or 0.001. There are 10 liters in 1 decaliter. There are 0.1 liters in 1 deciliter. There are 0.01 liters in 1 centiliter.

Color A is generated by mixing various color pigments. The constituent color pigments p, q and r are mixed in the ratio of 2:3:4 respectively to make 0.027 pints of color A. What is the required amount of pigment q? A. 0.09 pints B. 0.006 pints C. 0.003 pints D. 0.009 pints

Correct answer: 0.009 pints The ratio of p:q:r = 2:3:4 Add the numbers together to get the total number of parts. 2 + 3 + 4 = 9 Because out of a total of 9 parts, there are 3 parts of q in Color A, the fraction of q in the color is 3/9 or 1/3. Multiply 1/3 by the total amount of Color A. 1/3 × 0.027 = 0.009 pints

Arrange in ascending order: 5/8, 0.25, 87.5% A. 0.25, 5/8, 87.5% B. 0.25, 87.5%, 5/8 C. 87.5%, 5/8, 0.25 D. 87.5%, 0.25, 5/8

Correct answer: 0.25, 5/8, 87.5% Convert all the values to decimals to determine which is the largest. 5/8 = 0.625 0.25 = 0.25 87.5% = 0.875 In ascending order, the values would be: 0.25, 0.625, 0.875 or 0.25, 5/8, 87.5%

Kyle was in an accident in which his motorcycle slid 500 meters after the initial impact. How many kilometers did Kyle's motorcycle slide? A. 0.5 kilometers B. 5 kilometers C. 50 kilometers D. 5,000 kilometers

Correct answer: 0.5 kilometers If Kyle's motorcycle slid 500 meters, his motorcycle slid 0.5 kilometers. 1 kilometer = 1000 meters Therefore, 500 meters is equal to 1/2 of a kilometer, or 0.5 kilometers.

3/4 is how many times greater than 1/2? A. 1 1/2 B. 2 C. 1 3/4 D.

Correct answer: 1 1/2 Set up an equation to find the answer, x. 3/4 = 1/2x x = 3/4 ÷ 1/2 x = 3/4 × 2/1 x = 6/4 = 1 1/2

The ratio of two numbers is 2:3. If the smaller number is 6/8, what is the other number? A. 1/8 B. 1/2 C. 2 1/4 D. 1 1/8

Correct answer: 1 1/8 The ratio of two numbers is 2:3, or 2/3. The smaller number is 6/8, so let the larger number be x. Set up a proportion to find the larger number. 2/3 = (6/8)/x 2x = (6/8) x 3 2x = 18/8 x = (18/8) ÷ 2 x = 18/8 × 1/2 x = (18 × 1)/(8 × 2) = 18/16 = 1 2/16 = 1 1/8

3 1/6 ÷ 2 1/4 Which of the following options correctly simplifies the above expression? A. 1 11/27 B. 1 1/8 C. 7 1/8 D. 6 11/27

Correct answer: 1 11/27 In order to simplify the expression, express the mixed numbers as improper fractions 3 1/6 = 19/6 2 1/4 = 9/4 In order to divide by a fraction, multiply it by its reciprocal. 3 1/6 ÷ 2 1/4 = 19/6 ÷ 9/4 = 19/6 × 4/9 (19 × 4)/(6 × 9) = 76/54 Reduce the fraction to its lowest terms and express as a mixed number. 76/54 ÷ 2/2 = 38/27, or 1 11/27

Solve the following by dividing and reducing to the lowest common denominator. 7/9 ÷ 2/5 = A. 1/4 B. 1 17/18 C. 1 1/4 D. 17/18

Correct answer: 1 17/18 1. Apply this rule: a ÷ b/c = a × c/b 7/9 × 5/2 2. Apply this rule: a/b × c/d = ac/bd (7×5)/(9×2) 3. Simplify 7×5 to 35 35/(9×2) 4. Simplify 9×2 to 18 35/18 5. Simplify 1 17/18

Find the sum of 3/5 and the second lowest number in the following set of numbers: 7/9, 9/11, 2/3, 5/7, 9/13 A. 1 17/45 B. 1 11/35 C. 1 19/65 D. 1 4/15

Correct answer: 1 19/65 First, convert the numbers to decimals to determine the second lowest number. 7 ÷ 9 = 0.78 9 ÷ 11 = 0.82 2 ÷ 3 = 0.67 5 ÷ 7 = 0.71 9 ÷ 13 = 0.69 The second lowest number is 0.69, or 9/13. Add 3/5 to 9/13 by first finding a common denominator. 3/5 + 9/13 (3/5) × (13/13) + (9/13) × (5/5) 39/65 + 45/65 = 84/65, or 1 19/65

2/5 × 1 5/8 Which of the following options correctly simplifies the above expression? A. 1/4 B. 13/20 C. 3/10 D. 16/25

Correct answer: 13/20 In order to multiply mixed numbers and fractions, express the mixed number as a fraction. 1 5/8 = (1 × 8 + 5)/8 = 13/8 Next, multiply the numerators (2 and 13) and the denominators (5 and 8). (2 × 13)/(5 × 8) = 26/40 Reduce to lowest terms by dividing the numerator and denominator by 2. 26/40 ÷ 2/2 = 13/20

Which of the following skull bones contains the foramen magnum which allows for the connection of the brain to the spinal cord? A. Occipital bone B. Sphenoid bone C. Ethmoid bone D. Parietal bones

Occipital bone

Solve the following by subtracting. 3 15/16 - 2 3/8 = A. 1 5/8 B. 1 1/4 C. 1 9/16 D. 1 3/4

Correct answer: 1 9/16 1. Convert 3 15/16 to improper fraction Use this rule: a b/c = (ac+b)/c (3×16+15)/16 − 2 3/8 2. Simplify 3×16 to 48 48+15)/16 − 2 3/8 3. Simplify 48+15 to 63 63/16 − 2 3/8 4. Convert 2 3/8 to improper fraction Use this rule: a b/c = (ac+b)/c 63/16 − (2×8+3)/8 5. Simplify 2×8 to 16 63/16 − (16+3)/8 6. Simplify 16+3 to 19 63/16 − 19/8 7. Find the Least Common Denominator (LCD) of 63/16,19/8 Method 1: By Listing Multiples List out all multiples of each denominator, and find the first common one. 16 : 16 8 : 8,16 Therefore, the LCD is 16 Method 2: By Prime Factors List all prime factors of each denominator, and find the union of these primes. 16 : 2,2,2,2 8 : 2,2,2 Therefore, the LCD is 2×2×2×2=16 8. Make the denominators the same as the LCD 63/16 − (19×2)/(8×2) 9. Simplify - Denominators are now the same 63/16 − 38/16 10. Join the denominators (63−38)/16 11. Simplify 25/16 12. Convert to mixed fraction 1 9/16

How many meters is 1 kilometer? A. 1,000 meters B. 100 meters C. 0.001 meters D. 0.01 meters

Correct answer: 1,000 There are 1,000 meters in 1 kilometer. The prefix kilo- means one thousand, or 1,000. There are 100 meters in 1 hectometer. There are 0.001 meters in 1 millimeter. There are 0.01 meters in 1 centimeter.

Using a map scale of 9 inches representing 450 yards, how many inches on the actual ground are represented by one inch on the map? A. 1,800 inches B. 5,400 inches C. 16,200 inches D. 4,050 inches

Correct answer: 1,800 inches First find how many yards one inch on the map represents by setting up a proportion. 9 inches/450 yards = 1 inch/x yards 9/450 = 1/x 9x = 450 x = 50 yards Now convert yards into feet. 1 yard = 3 feet 1 yard x 50 = 3 feet x 50 = 150 feet Convert feet into inches. 1 foot = 12 inches 1 foot x 150 = 12 inches x 150 = 1,800 inches Therefore, 1 inch on the map represents 1,800 inches on the ground.

The percentage of carbon dioxide gas in a room before and after using charcoal fuel was is in the ratio of 6:8 respectively. If the new percentage was 1.4%, what was the initial percentage? A. 1.05% B. 0.60% C. 1.87% D. 2.50%

Correct answer: 1.05% Set up a proportion to find the initial percentage of carbon dioxide. 6/8 = x/1.4 (6 × 1.4) = 8x 8.4 = 8x x = (8.4/8) x = 1.05%

3/5 is how many times greater than 1/2? A. 1.5 B. 1.2 C. 0.8 D. 2

Correct answer: 1.2 The mathematical expression would be: 3/5 ÷ 1/2 When dividing by a fraction, multiply by its reciprocal instead. 3/5 × 2/1 = 6/5 = 1 1/5, or 1.2

How many pounds are equivalent to 20.4 ounces? A. 1.6 pounds B. 1.3 pounds C. 1.8 pounds D. 1.7 pounds

Correct answer: 1.3 pounds Set up a proportion to find the answer 1 pound/16 ounces = x pounds/20.4 ounces 1/16 = x/20.4 Cross multiply to solve 16x = 20.4 x = 20.4 ÷16 = 1.3 pounds

Every day that it rained in March, Cindy measured the rainfall. She recorded the following measurements on her calendar: 1.5 in, 0.5 in, 2 in, 0.75 in, and x. What is the value of x if the average rainfall measurement was 1.25 in? A. 0.75 in B. 1.5 in C. 1.25 in D. 2.0 in

Correct answer: 1.5 in The average is found by adding the totals together and dividing by the number of days. Solve the following equation, with x representing the rainfall of the fifth day. (1.5 in + 0.5 in + 2.0 in + 0.75 in + x) ÷ 5 = 1.25 in. (4.75 in + x) ÷ 5 = 1.25 4.75 in + x = 6.25 x = 6.25 - 4.75 x = 1.5 in

Convert 19/10 to a decimal. A. 1.9 B. 19.0 C. 190.0 D. 0.19

Correct answer: 1.9 To convert 19/10 to a decimal, simply move the decimal one place to the left = 1.9

Solve: (2/5) × (5/8) A. 1/4 B. 25/16 C. 16/25 D. 7/13

Correct answer: 1/4 To multiply a fraction, multiply the numerators and the denominators. 2/5 × 5/8 (2 × 5)/(5 × 8) = 10/40 Reduce the fraction to simplest terms. 10/40 ÷ 10/10 (10 ÷ 10)/(40 ÷ 10) = 1/4

Alice runs two miles in 10 minutes. How many miles can she run in one minute? A. 2/3 mile B. 2/5 mile C. 1/2 mile D. 1/5 mile

Correct answer: 1/5 mile 2 miles/10 minutes = x miles/1 minute Cross multiply to solve. 10x = 2 x = 2/10 = 1/5 mile

If two of the angles in a triangle are 40 degrees each, what is the third angle? A. 40 degrees B. 100 degrees C. 90 degrees D. 110 degrees

Correct answer: 100 degrees Every triangle contains 180 degrees. In order to get the degree measurement of the third angle, the other two angles from 180. 180 - 40 - 40 = 100 degrees

How many liters is 1 hectoliter? A. 100 liters B. 0.001 liters C. 1,000 liters D. 10 liters

Correct answer: 100 liters There are 100 liters in 1 hectoliter. The prefix hecta- means one hundred, or 100. There are 10 liters in 1 decaliter. There are 1,000 liters in 1 kiloliter. There are 0.001 liters in 1 milliliter.

It took 3 yards of gauze dressing to wrap a patient's arm. How many inches of gauze dressing was used? A. 72 inches B. 36 inches C. 108 inches D. 96 inches

Correct answer: 108 inches 3 yards of gauze dressing is equivalent to 108 inches of gauze dressing. 1 foot contains 12 inches 1 yard contains 3 feet Therefore, 3 yards contain 9 feet, or 108 inches (9 feet x 12 inches/foot = 108 inches).

Brady can grade 5 essays per hour. If he starts grading essays at 4:30 p.m., which of the following is the best estimate as to when he will be finished grading 29 essays? A. 10:30 p.m. B. 10:00 p.m. C. 11:00 p.m. D. 9:30 p.m.

Correct answer: 10:30 p.m. Since Brady can grade 5 essays in 1 hour, set up a proportion to find out how long it will take him to grade 29 essays. 5/1 = 29/x 5x = 29 x = 29/5 = 5 4/5 The question asks for an estimate, so we can round up 5 4/5 to 6 hours. Add 6 hours to 4:30 p.m. to get 10:30 p.m.

Seventy-five percent of the dinner party ordered wine with the meal. If that percentage equaled 9 diners, what was the total number of diners in the dinner party? A. 21 diners B. 18 diners C. 15 diners D. 12 diners

Correct answer: 12 diners According to the problem, 9 diners is equivalent to 75% of the dinner party. Set up an equation to find the total number of diners. 0.75d = 9 d = 9 ÷ 0.75 d = 12

Joyce runs 10 miles in 60 minutes. How much longer does it take her to run 12 miles? A. 10 minutes B. 12 minutes C. 15 minutes D. 18 minutes

Correct answer: 12 minutes Set up a proportion to find out how long it will take Joyce to run 12 miles. 10 miles/60 minutes = 12 miles/x minutes 10/60 = 12/x 720 = 10x x = 72 minutes Subtract 72 minutes from 60 minutes to find the difference. 72 - 60 = 12 minutes

Ashley was 98 pounds one year ago. If she now weighs 112 pounds, what is the percent increase in her weight? A. 12.5% B. 15.3% C. 14.2% D. 18.5%

Correct answer: 14.2% Ashley's weight changed by 112 - 98, or 14 pounds. Divide this amount by the original amount and multiply by 100 to determine percent change. (14 ÷ 98) × 100 = 14.2%

Ruth is five years older than Tom. Two years from now, Tom will be 5 years old. Find the sum of their ages three years from now. A. 21 years old B. 17 years old C. 15 years old D. 16 years old

Correct answer: 17 years old Let Tom's age be x, and Ruth's age is x + 5. In two years, Tom will be 5 years old. That means Tom is 5 - 2 = 3 years old. Ruth's age is x + 5 = 3 + 5 = 8 years old. Three years from now: Tom = 3 + 3 = 6 years Ruth = 8 + 3 = 11 years The sum of their ages is 11 + 6 = 17 years old.

Estimate Martha's height in centimeters if she is 5' 7" tall. A. 170 cm B. 67 cm C. 150 cm D. 201 cm

Correct answer: 170 cm Start by converting 5' 7" into inches. 1 foot = 12 inches 1 foot x 5 = 12 inches x 5 = 60 inches plus 7 inches = 67 inches Next, multiply 67 times the amount of centimeters in an inch. 1 inch = 2.54 cm 1 inch x 67 = 2.54 cm x 67 = 170.18 cm This can be rounded to 170 cm.

If David's lawn has an area of 20 square yards, what is the closest area in square feet? A. 120 ft² B. 60 ft² C. 20 ft² D. 180 ft²

Correct answer: 180 ft² One square yard (yd²) equals 9 square feet (ft²). Therefore, multiply 20 yd² by 9. 20 × 9 = 180 ft²

Which of the following elements is an alkali metal? A. 108 - Hs B. 85 - At C. 19 - K D. 38 - Sr

Correct answer: 19 - K Potassium (K) is an alkali metal. Strontium (Sr) is an alkaline earth metal. Hassium (Hs) is a transitional metal, and Astatine (At) is a halogen.

The distance between points A and B on a map is 7 inches. If two inches on a map represents 56 yards, how far is point A from point B in yards? A. 196 yards B. 112 yards C. 392 yards D. 130 yards

Correct answer: 196 yards Since 2 inches represents 56 yards, set up a proportion to find out how far A is from B in yards. 2 inches/56 yards = 7 inches/x number of yards 2/56 = 7/x 2x = 392 x = 196 yards

The total weight of three students is x. If the weights of the first and second students are 20% and 40% of x respectively, what is the ratio of the weight of the three students? A. 1:2:5 B. 1:2:4 C. 1:2:2 D. 2:4:3

Correct answer: 1:2:2 Since the total weight of the students is 100%, subtract 20% and 40% from 100%. 100% - 20% = 80% - 40% = 40% New set up the ratio of the three students. 20:40:40 Simplify the ratio by dividing each number by 20. (20/20):(40/20):(40/20) = 1:2:2

5 1/4 ÷ 2 1/2 = ? A. 2 1/10 B. 2 1/8 C. 8 1/8 D. 13 1/8

Correct answer: 2 1/10 In order to simplify the expression, convert the mixed numbers to improper fractions. 5 1/4 = 21/4 2 1/2 = 5/2. 5 1/4 ÷ 2 1/2 = 21/4 ÷ 5/2 To divide by a fraction, multiply by its reciprocal. 21/4 ÷ 5/2 = 21/4 × 2/5, or 42/20. Reduce to its lowest terms. 42/20 ÷ 2/2 = 21/10 Finally, express 21/10 as a mixed number. 21/10 = 2 1/10

The furniture in the dollhouse was designed on a 1:30 scale of the original furniture. If an original bed measured 5 feet by 8 feet, what are the measurements of the bed in the dollhouse? A. 5 inches × 8 inches B. 15 inches × 24 inches C. 2 inches × 3.2 inches D. 2.5 inches × 4 inches

Correct answer: 2 inches × 3.2 inches This question can be solved by setting it up as a proportion. First, convert the feet into inches. 1 foot = 12 inches 5 feet = 1 foot x 5 = 60 inches 8 feet = 1 foot x 8 = 96 inches Then, solve each of the following proportions: 1/30 = x/60 and 1/30 = x/96. 1/30 = x/60 30x = 60 x = 2 inches 1/30 = x/96 30x = 96 x = 3.2 inches Therefore, the dollhouse bed will measure 2" × 3.2".

Iron is a multivalent element. Which of the following charges can it possess? A. 2+, 3+ B. 3+, 4+ C. 2-, 3- D. 1+, 2+

Correct answer: 2+, 3+ Iron (Fe) can possess a charge of positive 2 or 3 (2+ or 3+), depending on the reaction in which it is participating.

John adopted his dog exactly 5 years and 12 days ago. At this instant, how many minutes has John had his dog? (Ignore leap years.) A. 1,872,234 minutes B. 2,645,280 minutes C. 2,217,116 minutes D. 3,098,732 minutes

Correct answer: 2,645,280 minutes Start by finding the number of days in 5 years. 1 year = 365 days 1 year x 5 = 365 days x 5 = 1,825 days Add the 12 days. 1,825 days + 12 days = 1,837 days Convert the number of days to hours. 1 day = 24 hours 1 day x 1,837 = 24 hours x 1,837 = 44,088 hours Convert the number of hours to minutes. 1 hour = 60 minutes 1 hour x 44,088 = 60 minutes x 44,088 = 2,645,280 minutes

If a horse runs a 0.5-mile track in 6 minutes, how many miles can the horse run in 30 minutes? A. 2.5 miles B. 3.5 miles C. 1.5 miles D. 2 miles

Correct answer: 2.5 miles This question can be answered by setting it up as a proportion. 0.5 miles/6 minutes = n miles/30 minutes 0.5/6 = n/30 6n = 15 n = 15/6 = 2.5 miles

A book writing conference of 800 individuals had a 3 to 1 ratio of women to men. How many men attended the book writing conference? A. 260 men B. 220 men C. 200 men D. 150 men

Correct answer: 200 men Set up an equation, with x representing the number of men. Because there were 3 times as many women as men, 3x equals the number of women. Solve the following equation: x + 3x = 800 4x = 800 x = 200

How would 1.05 be displayed as a fraction? A. 20/21 B. 15/100 C. 105/10 D. 21/20

Correct answer: 21/20 To convert 1.05 into a fraction, first change it into an improper fraction. 1 5/100 = (100 × 1 + 5)/100 = 105/100 Reduce the fraction by dividing both numerator and denominator by 5. 105/100 ÷ 5/5 = 21/20

John needs to purchase barbed wire to build a fence. Each row requires 110 feet of barbed wire. If John has 6 rows, what is the total length (in yards) of barbed wire that he needs to purchase? A. 660 yards B. 330 yards C. 220 yards D. 110 yards

Correct answer: 220 yards The first step is to calculate the total number of feet of barbed wire John needs by multiplying 110 feet by 6 rows. 110 feet x 6 rows = 660 total feet Next, convert this number to yards by setting up a proportion. 1 yard/3 feet = x yards/660 feet 1/3 = x/660 3x = 660 x = 220 yards

25% of a number is 36. What is 16% of the number? A. 23 B. 26 C. 32 D. 59

Correct answer: 23 First convert 25% to a decimal. 25% = 25/100 = 0.25 Set up an equation based on the given information. 0.25x = 36 x = 36/0.25 = 144 Find 16% of 144. 16% = 16/100 = 0.16 0.16 × 144 = 23.04 ≈ 23

Of the 2,716 cars sold in the last quarter, Charles sold 679. What percentage of the cars sold did Charles sell? A. 25% B. 40% C. 45% D. 36%

Correct answer: 25% In order to solve the problem, divide Charles's car sales by the total. 679 ÷ 2716 = 0.25 Convert this to a percentage by multiplying by 100. 0.25 × 100 = 25%

The winery sold 81 cases of wine this week. If twice as many red cases were sold than white, how many white cases were sold this week? A. 32 cases B. 27 cases C. 61 cases D. 54 cases

Correct answer: 27 cases Let's represent the number of cases of white wine as w. There are twice as many cases of red wine than white, so red wine = 2w. The total number of cases is 81, so w + 2w = 81. Solve for w: w + 2w = 81 3w = 81 w = 27 cases

Which option identifies the products in the chemical equation below? 2HCl + 2Na → 2NaCl + H2 A. 2HCl and 2Na B. 2HCl and 2NaCl C. 2HCl, 2Na, 2NaCl, and H2 D. 2NaCl and H2

Correct answer: 2NaCl and H2 The products for the chemical equation (2HCl + 2Na → 2NaCl + H2) are 2NaCl and H2. A chemical equation shows the substances (reactants) that are being changed into other substances (products). Anything before the arrow are the reactants and anything after the arrow are products (Reactants → Products). 2NaCl and H2 are the reactants of the chemical equation. 2HCl, 2Na, 2NaCl, and H2 include all the elements from the chemical equation. 2HCl and 2NaCl contain one reactant and one product from the chemical equation.

A number is two more than double a given number. How would this phrase be translated into a mathematical expression? A. 2n x 2 B. 2n + 2 C. 2 x 2 + n D. 2(n + 2)

Correct answer: 2n + 2 If "n" equals the given number, doubling it would be 2n. To find the number that is 2 more, add 2 to 2n: 2n + 2

Write the following as an inequality: Twice the sum of 2 and a number is less than the square of that number. A. 4 > x²+ x B. 2x + 4 > x² C. 2x < x² + 4 D. 2x + 4 < x²

Correct answer: 2x + 4 < x² Let x represent 'the number' described in the problem. Therefore, the sum of 2 and that number is 2 + x. 'Twice the sum' means it is multiplied by 2 Therefore, 2(2 + x). 'Less than' is represented by the symbol '<.' The square of the number is x². Therefore, 2(2 + x) < x². 2x + 4 < x²

Three steaks were purchased from the grocery store. The first steak weighed 1 1/2 pounds, the second steak weighed 1 1/4 pounds, and the third steak weighed 1 1/8 pounds. What was the total weight of the three steaks purchased from the grocery store? A. 1 1/64 pounds B. 3 7/8 pounds C. 1 7/8 pounds D. 3 1/6 pounds

Correct answer: 3 7/8 pounds In order to find the total weight, add the three amounts together by finding Add the three fractional amounts together by finding the lowest common denominator, which is 8. Convert the fractions to be expressed in eighths. 1 1/2 = 1 4/8 1 1/4 = 1 2/8 1 1/8 = 1 1/8 Add the whole numbers together. 1 + 1 + 1 = 3 Next, add the numerators of the fractions together. 4 + 2 + 1 = 7 Therefore, the total weight is 3 7/8 pounds.

If a fish swims 5 miles in 1.5 hours, how far will it swim in 9 hours? A. 26 miles B. 45 miles C. 30 miles D. 58 miles

Correct answer: 30 miles This question can be answered by setting it up as a proportion 5 miles/1.5 hours= n miles/9 hours 5/1.5 = n/9 Cross multiply to solve. (5 × 9) = (1.5 × n) 1.5n = 45 n = 45 ÷ 1.5 n = 30 miles

Seventy percent of the runners ran a lap of the track within 3 minutes. If that percentage equaled 21 runners, what was the total number of runners? A. 40 runners B. 30 runners C. 28 runners D. 37 runners

Correct answer: 30 runners Convert 70% to a decimal by dividing by 100. 70% = 70/100 = 0.7 Create an equation to find the total number of runners, x. 0.7x = 21 x = 30 runners

Solve the following by dividing and reducing to the lowest common denominator. 10 1/3 ÷ 1/3 = A. 33 1/3 B. 31 1/3 C. 31 D. 3 1/3

Correct answer: 31 1. Convert 10 1/3 to improper fraction Use this rule: a b/c = (ac+b)/c (10×3+1)/3 ÷ 1/3 2. Simplify 10×3 to 30 (30+1)/3 ÷ 1/3 3. Simplify 30+1 to 31 31/3 ÷ 1/3 4. Apply this rule: a ÷ b/c = a × c/b 31/3 × 3 5. Simplify 93/3 6. Simplify 31

1 liter = 1.76 pints Calculate the number of liters in 56.32 pints. A. 38 liters B. 28 liters C. 42 liters D. 32 liters

Correct answer: 32 liters Set up a proportion to find the number of liters in 56.32 pints. 1 liter/1.76 pints = x number of liters/56.32 pints 1/1.76 = x/56.32 1.76x = 56.32 × 1 x = 56.32/1.76 = 32 liters

Mary had a 1-quart jar of solution. How many ounces of solution did Mary have? A. 32 ounces B. 40 ounces C. 36 ounces D. 24 ounces

Correct answer: 32 ounces A 1-quart jar of solution is equivalent to 32 ounces of solution. There are 8 ounces in 1 cup. There are 2 cups in 1 pint. There are 2 pints in 1 quart. Therefore, there are 4 cups in 1 quart, which equates to 32 ounces. 4 cups x 8 ounces/cup = 32 ounces.

Convert 32 meters into millimeters. A. 32,000 mm B. 320 mm C. 320,000 mm D. 3,200 mm

Correct answer: 32,000 mm 1 meter = 1,000 millimeters Therefore, multiply 1,000 by 32. 1,000 × 32 m = 32,000 mm

The atomic number for the element zinc (Zn) is 30. If the element has a negative charge of 3, how many electrons does the element have? A. 10 B. 14 C. 27 D. 33

Correct answer: 33 Since the atomic number for zinc is 30 and it has a negative charge of 3, it would have 33 electrons. When an element has a negative charge, the charge is added to the atomic number. 30 + 3- = 33e When zinc has a negative charge of 3, it contains 33 electrons, not 10, 14, or 27.

A pharmacy filled 25 brand name prescriptions, 35 generic prescriptions, and some OTC prescriptions. There is a 1 to 3 ratio of generic prescriptions to OTC prescriptions. Which of the following numbers in the problem are needed to find the total number of OTC prescriptions that were filled? A. 1 and 3 only B. 25, 1, and 3 only C. 35, 1, and 3 only D. 35, 25, 1, and 3

Correct answer: 35, 1, and 3 only In order to find the actual number of OTC prescriptions, you need the numbers in the initial ratio, plus one actual number. This can be set up as an equation: 1 = 35 3 x You do not need the number of brand name prescriptions because this is not part of the ratio that is given.

Express 21 as a percentage of 57. A. 36.84% B. 11.97% C. 0.36% D. 25.78%

Correct answer: 36.84% To express one number as a percentage of another number, calculate its decimal value and multiply it by a 100: (21 ÷ 57) × 100 (0.3684) × 100 = 36.84%

A normal human body temperature in Celsius is which of the following? A. 41 degrees Celsius B. 32 degrees Celsius C. 37 degrees Celsius D. 39 degrees Celsius

Correct answer: 37 degrees Celsius A normal human body temperature in Celsius is between 36.5 and 37.5 degrees Celsius. To convert Fahrenheit to Celsius and vice versa, remember the following equations: C = F - 32 x 5/9 F = C x 9/5 + 32

Kelvin is a temperature system only used in the scientific community. Which of the following Kelvin temperatures represents the boiling point of water? A. 373 K B. 310 K C. 0 K D. 273 K

Correct answer: 373 K The Kelvin temperature that represents the boiling point of water is 373 K. 273 K represents the freezing point of water. 310 K represents the common body temperature of humans. 0 K represents the lowest achievable temperature, which is equivalent to -273 degrees Celsius. Formula for Kelvin to Fahrenheit: F = K × 9/5 - 459.67 Example: F = 310 × 9/5 - 459.67 F = 310 x 1.8 - 459.67 F = 98.3

What is the perimeter of a rectangle with a length of 13 and a width of 6? A. 112 B. 19 C. 38 D. 78

Correct answer: 38 The perimeter of a rectangle is the sum of all its sides, or 2L + 2W = P. 13 + 13 + 6 + 6 = 38 Alternatively, 2(13) + 2(6) = 26 + 12 = 38

If twice a number is half of the sum of that number and 12, what is the value of the number? A. 6 B. 4 C. 2 D. 12

Correct answer: 4 'Twice a number' is 2 times a number x, or 2x. 'Half the sum of that number and 12' is x + 12 multiplied by 1/2, or: x + 12 2 Therefore, 2x = (x +12)/2 Solve for x. 2x = (x +12)/2 2(2x) = x +12 4x = x +12 3x = 12 x = 4

Solve for y: 5x + 3y = 22 y = 2x A. 5 B. 4 C. 3 D. 2

Correct answer: 4 First, plug the definition of y from the second equation into the first equation. 5x + 3(2x) = 22 Simplify and solve for x. 5x + 6x = 22 11x = 22 x = 22 ÷ 11 x = 2 Next, plug x back into the second equation for y and solve. y = 2x y = 2 × 2 y = 4

Simplify the following: 8 1/3 ÷ 15/9 - 1/2 A. 4 1/2 B. 9 13/18 C. 7 1/7 D. 7 5/6

Correct answer: 4 1/2 Convert the fractions into improper fractions. 8 1/3 ÷ 15/9 - 1/2 25/3 ÷ 15/9 - 1/2 Use PEMDAS (parentheses, exponents, multiplication, division, addition, subtraction) to perform the correct order of operations. 25/3 ÷ 15/9 - 1/2 (25/3 ÷ 15/9) - 1/2 (25/3 × 9/15) - 1/2 (25 × 9)/(3 × 15) - 1/2 225/45 - 1/2 Find a common denominator. 450/90 - 45/90 = 405/90 = 4 1/2

Convert 4.0124384053 to a fraction by rounding off to three decimal places. A. 4 3/25 B. 4 3/250 C. 4 63/500 D. 4 13/50

Correct answer: 4 3/250 Round off 4.0124384053 to three decimal places: 4.0124384053 ≈ 4.012 To convert to a fraction, move the decimal three places to the right and divide by 1,000: 4.012 = 4012/1000 Simplify the fraction. 4012/1000 = 4 12/1000 4 12/1000 = 4 3/250

Convert 0.04 into a percentage. A. 0.04% B. 40% C. 4% D. 0.4%

Correct answer: 4% A decimal can be converted to a percent by multiplying it by 100 and adding a percent sign. 0.04 × 100 = 4%

Twenty percent of the sheep were grazing in the pasture, and the rest were in the barn. If the number of sheep in the pasture equaled 11, how many sheep were still in the barn? A. 33 sheep B. 55 sheep C. 44 sheep D. 66 sheep

Correct answer: 44 sheep In order to solve the question, convert 20% to a decimal. 20% = 20/100 = 0.20 Use the following formula to determine the total number of sheep: 0.20s = 11 s = 11 ÷ 0.20 s = 55 Now, you can determine how many sheep are still in the barn by subtracting the number of sheep in the pasture from the total number of sheep. 55 - 11 = 44

The operations manager is designing a new office layout and assumes 3 office chairs per 2 desks. How many office chairs will be needed for an office building with 30 desks? A. 60 chairs B. 90 chairs C. 30 chairs D. 45 chairs

Correct answer: 45 chairs In order to solve this problem, set it up as a proportion. 3 chairs/2 desks = c/30 desks 3/2 = c/30 Cross-multiply to solve. 3 × 30 = 2c 90 = 2c c = 90 ÷ 2 c = 45

Simplify: 5/6 × 63 - 27 ÷ 4 1/2 A. 46 1/2 B. 47 1/2 C. 45 1/2 D. 46 3/10

Correct answer: 46 1/2 To simplify the fraction, use PEMDAS (parentheses, exponents, multiplication, division, addition, subtraction) to dictate the order of operations. First, perform multiplication. (5/6 × 63) - (27 ÷ 4 1/2) 315/6 - (27 ÷ 4 1/2) Next, perform division. Convert the mixed fraction to an improper fraction. 315/6 - (27 ÷ 4 1/2) 315/6 - (27 ÷ 9/2) Invert 9/2 and multiply. 315/6 - (27 ÷ 9/2) 315/6 - (27 x 2/9) 315/6 - (54/9) 315/6 - 6 Convert 6 to a fraction and subtract. 315/6 - 36/6 = 279/6 Simplify. 279/6 = 46 1/2

Suppose Jack and Jane are the same height, and Jack's height increases by 15% to 5.75 ft. If Jane does not grow, what is her height? A. 5 ft B. 5.6 ft C. 5.2 ft D. 5.4 ft

Correct answer: 5 ft 15% of Jack's height can also be expressed as 1.15 multiplied by Jack's height. Let x be Jack and Jane's original height: 1.15x = 5.75 x = 5.75 ÷ 1.15 x = 5 ft

Arrange in descending order: 5, 1/6, 280% A. 1/6, 280%, 5 B. 5, 280%, 1/6 C. 5, 1/6, 280% D. 280%, 1/6, 5

Correct answer: 5, 280%, 1/6 Convert all the values to decimals to determine the appropriate order: 5 = 5.0 1/6 = 0.16667 280% = 2.80 Therefore, in descending order - which means from greatest to least - the values are: 5.0, 2.80, 0.16667 or 5, 280%, 1/6

If Rachel needs 5 kilograms of solution, how many milligrams of solution does she need? A. 500,000 milligrams B. 500 milligrams C. 5,000 milligrams D. 5,000,000 milligrams

Correct answer: 5,000,000 milligrams If Rachel needs 5 kilograms of solution, she needs 5,000,000 milligrams of solution. 1 kilogram is equal to 1,000 grams, so 5 kilograms are equal to 5,000 grams. 1 gram is equal to 1,000 milligrams, so 5,000 grams are equal to 5,000,000 milligrams.

A model car was designed on a 1:20 scale of the original car. If the original car had a length of 9 feet and a height of 4 feet, what are the measurements of the model car? A. 4.5 inches × 2 inches B. 5.4 inches × 2.4 inches C. 18 inches × 8 inches D. 9.2 inches × 4.2 inches

Correct answer: 5.4 inches × 2.4 inches This question can be solved by setting it up as a proportion. First, convert the feet into inches: 1 foot = 12 inches 9 feet = 9 feet × 12 inches = 108 inches 4 feet = 4 feet × 12 inches = 48 inches Then, solve each of the following proportions: 1/20 = x/108 1/20 = x/108 20x = 108 x = 5.4 inches 1/20 = x/48 1/20 = x/48 20x = 48 x = 2.4 inches Therefore, the dimensions of the model car are 5.4 inches × 2.4 inches

A rock weighing 654 pounds contains 120 pounds of zinc and 360 pounds of iron. What is the percentage of the iron in the rock? A. 55% B. 26% C. 44% D. 33%

Correct answer: 55% The weight of iron = 360 pounds Total weight of the rock = 654 pounds Percentage of iron in the rock = 360/654 × 100 = 55%

View the supporting details to answer the following question. The atomic mass for cobalt is which of the following? Show Details A. (243) g.mol-1 B. 196.9655 g.mol-1 C. 58.9332 g.mol-1 D. 208.9804 g.mol-1

Correct answer: 58.9332 g.mol-1 The atomic mass for cobalt is 58.9332 g.mol-1. This question simply requires you to know how to use a table to identify information regarding selected substances. 196.9655 g.mol-1 is incorrect because it is the atomic mass for gold. 208.9804 g.mol-1 is incorrect because it is the atomic mass for bismuth. (243) g.mol-1 is incorrect because it is the atomic mass for americium.

Alisha purchased a new vehicle for $32,500 and she was responsible for paying the $2,112.50 sales tax at the title office. What is the percentage sales tax that Alisha paid on her new vehicle? A. 7.50% B. 6.50% C. 5% D. 7%

Correct answer: 6.50% In order to find the percentage of sales tax, divide $2,112.50 by $32,500. and then multiply by 100. $2,112.50 ÷ $32,500 = 0.065 Next, multiply by 100. 0.065 × 100 = 6.50%

In order for a solution to have a neutral pH, its pH should be what? A. Below 7.0 B. Above 7.0 C. 7.0 D. Between 0.0 and 14.0

Correct answer: 7.0 pH is the measure of acidity or alkalinity. Acid: substance with a pH less than 7 Base (alkaline): substance with a pH greater than 7 Neutral: substance with a pH of 7

If a substance has a mass of 30.9 g and a volume of 4.3 cm3, what would the substance's density be? A. 0.14 g/cm3 B. 7.2 g/cm3 C. 35.2 g/cm3 D. 132.87 g/cm3

Correct answer: 7.2 g/cm3 If a substance has a mass of 30.9 g and a volume of 4.3 cm3, the substance's density would be 7.2 g/cm3. To find the density, you would divide the mass by the volume. 30.9 g / 4.3 cm3 = 7.2 g/cm3. The other options do not correctly reflect the substance's density.

Find the result of the following operation: Multiply 3/4 by itself then subtract the result from 1. A. -7/16 B. 9/16 C. -9/16 D. 7/16

Correct answer: 7/16 The operation is 1 - (3/4 × 3/4). First multiply 3/4 by 3/4. 3/4 × 3/4 = 9/16 Solve the expression by converting 1 into a fraction. 1 - 9/16 16/16 - 9/16 = 7/16

In his geography class, Eric took four quizzes. He scored an 84 on his first quiz, an 88 on his second quiz, and an 86 on his third quiz. If Eric had an average of 82 in his class, what did he score on his fourth quiz? A. 70 B. 76 C. 82 D. 85

Correct answer: 70 The average is found by adding all numbers together and then dividing by the number of values. Set up an equation to find the missing quiz value, q. 84 + 88 + 86 + q = 82 4 258 + q = 82 4 258 + q = 82 × 4 258 + q = 328 q = 328 - 258 = 70

30 is 40% of what number? A. 135 B. 120 C. 150 D. 75

Correct answer: 75 In order to solve the question, use the following formula: 0.40n = 30, as 40% (or 0.40) of a number is 30. Then, solve the equation. 0.40n = 30 n = 30 ÷ 0.40 n = 75

A tank loses 20 cubic inches of water after 3 hours through leakage. If the tank has 80,000 cubic inches of water, how much will remain in the tank after a total of two days? A. 79,680 cubic inches B. 79,040 cubic inches C. 79,520 cubic inches D. 79,840 cubic inches

Correct answer: 79,680 cubic inches First, find out how many hours are in two days. 1 day = 24 hours 1 day x 2 = 24 hours x 2 = 48 hours In 3 hours, 20 cubic inches is lost. Set up a proportion to find out how much water is lost in 48 hours. 3 hours/20 cubic inches = 48 hours/x number of cubic inches 3/20 = 48/x 3x = 960 x = 320 cubic inches Because the question asks for the remaining quantity, rather than the amount lost, subtract this amount from the original amount in the tank. 80,000 - 320 = 79,680 cubic inches

There were 46 employees in the office. Of those employees, 16 had offices and the rest had cubicles. What is the ratio of offices to cubicles? A. 1/5 B. 5/16 C. 3/16 D. 8/15

Correct answer: 8/15 There were 46 employees in all, and of those, 16 had offices. Subtract to find the number with cubicles. 46 - 16 = 30 The ratio of offices to cubicles is 16:30, or 16/30. Simplify to lowest terms. 16/30 ÷ 2/2 = 8/15

The data below shows the performance of five students on a test: 72%, 64%, 81%, 78%, 75% The student who scored 75% on the test approached the teacher for re-grading. The teacher awarded a 6% increase in her score. What was her new score? A. 80% B. 81% C. 82% D. 83%

Correct answer: 80% The initial percentage before increase was 75%. 6% can be expressed as a fraction by dividing 6 by 100. 6 ÷ 100 = 6/100 Multiply 75 by 6/100 to find 6% of 75. (75 × 6)/100 = 450/100 = 4.5 Add 4.5 to 75 to find out the revised score. 75 + 4.5 = 79.5 ≅ 80%

Express 32 as a percentage of 40. A. 65% B. 75% C. 80% D. 85%

Correct answer: 80% To express 32/40 as a percentage, divide 32 by 40. 32/40 = 4/5 Convert to a decimal and multiply by 100 to find the percentage. 4/5 = 0.8 × 100% = 80%

A pipe can supply 25 cubic centimeters of water in a tank in one second. How long will the pipe take to fill a 2000-liter tank? A. 800 seconds B. 80 seconds C. 80,000 seconds D. 8,000 seconds

Correct answer: 80,000 seconds 1 liter = 1,000 cubic centimeters 1 liter × 2,000 = 1,000 cubic centimeters × 2,000 = 2,000,000 cubic centimeters If 25 cubic centimeters is supplied in one second, 2,000,000 cubic centimeters will be supplied in 2,000,000/25 seconds. 2,000,000/25 = 80,000 seconds

Caitlyn was grading her students' exams. She had seven students who scored a 93, nine students who scored a 96, and three students who scored a 70. What was the average exam score in Caitlyn's class? A. 74.78 B. 92.33 C. 86.33 D. 90.79

Correct answer: 90.79 To find the average, take the sum of the test scores and divide it by the number of students who took the test. First find the sum of the test scores. 7(93) + 9(96) + 3(70) = 651 + 864 + 210 = 1,725 Next, find the total number of students who took the test. 7 + 9 + 3 = 19 Divide the sum of the test scores by the number of students to find the average. 1,725 ÷ 19 = ~90.79

Simplify: (27x + 9) / 3

Correct answer: 9x + 3 First, find a common multiple and factor it out. (27x + 9) / 3 = 3(9x + 3) / 3 The 3 cancels in the numerator and denominator, leaving 9x + 3.

An atom's physical structure is composed of which of the following? A. Protons and neutrons B. A nucleus and orbits C. A nucleus and electrons

Correct answer: A nucleus and orbits An atom's physical structure is composed of a nucleus and orbits. An atom is the basic building block of a molecule. The nucleus is composed of protons and neutrons. The orbits of electrons are at the outermost part of the atom, and they spin around the nucleus.

What are the bases of DNA? A. Adenine, thymine, guanine, cytosine B. Adenine, thymine, guanine, uracil C. Thymine, guanine, cytosine D. Adenine, thymine, guanine

Correct answer: Adenine, thymine, guanine, cytosine Deoxyribonucleic acid (DNA) is a macromolecule that contains coded instructions for the body to produce proteins. It is composed of four nucleotide letters: A (adenine), T (thymine), G (guanine), and C (cytosine). These nucleotides are arranged in three-letter combinations to make 64 possible "words" called codons. A gene is a "sentence" made of a specific order of codons that produces a protein. Each codon specifies one amino acid and these codons instruct ribosomes to assemble the amino acids in a particular order. A chromosome is a structure made of protein and one molecule of DNA. Chromosomes regulate where a gene starts and ends and which genes are read in a cell. The relationships between the bases are always constant. Adenine and thymine always bond and cytosine and guanine always bond: AT and CG.

What is the type of neuron that transmits sensory signals from receptors to the central nervous system? A. Efferent (motor) neuron B. None of these C. Interneuron D. Afferent (sensory) neuron

Correct answer: Afferent (sensory) neuron The neuromuscular system integrates muscles and nerves. This system affects every part of the body and is vital in controlling involuntary and voluntary movement. Afferent (sensory) neurons transmit sensory signals from receptors to the central nervous system. Afferent neurons are also known as sensory neurons. Efferent (motor) neurons broadcast nerve impulses away from the central nervous system and to the effector organs. Interneurons receive information from the afferent neurons and directs the information through the use of the efferent neurons.

Which type of solution uses mercury to dissolve another metal type? A. Amalgams B. Emulsions C. Alloys D. Compounds

Correct answer: Amalgams Amalgams are solutions that use mercury to dissolve another metal type. Alloys are solutions that make a new type of metal by combining solid solutions of other metals. Compounds are solutions that create a single matter by mixing different elements. Emulsions are solutions that combine readily separate matter.

What term is used to describe a substance that can act as either a base or an acid? A. Osmotic B. Mesonic C. Amphoteric D. Hydrolytic

Correct answer: Amphoteric Something that is amphoteric can act as either a base or an acid. Water is one example because it may either provide a proton, like an acid, or accept a proton, like a base, depending on the situation.

Closings used to end a piece of writing may include all except which of the following? A. Answers to unresolved questions B. A highlight of a key supporting point C. An argument to prove a point D. An analysis or reflection

Correct answer: An argument to prove a point An argument to prove a point would appear in the body, or middle, not at the closing. The closing paragraph is used to tie up the writing's loose ends and may include answers to unresolved questions, an analysis or reflection, or a highlight of a key supporting point.

An anion is best described by which of the following? A. An ion that has fewer electrons and has a positive charge B. An ion that has extra electrons and has a negative charge C. An ion that has extra protons and has a negative charge D. An ion that has fewer protons and has a positive charge

Correct answer: An ion that has extra electrons and has a negative charge An anion is an ion that has extra electrons and has a negative charge. Since protons have a positive charge and electrons have a negative charge, an atom that has more electrons than protons will have a negative charge. A cation is an ion that has fewer electrons and has a positive charge. The number of protons in an atom remains constant and does not change; therefore, an ion will not have protons added or subtracted.

The number of protons in the nucleus of an atom is what number? A. Mass number B. Nucleon number C. Cellular number D. Atomic number

Correct answer: Atomic number The number of protons in the nucleus of an atom is the atomic number. The mass number and the nucleon number are the sum of protons and neutrons in an atom's nucleus.

Neutrophils, eosinophils, and basophils are white blood cells that are collectively known as granulocytes. What do neutrophils do? A. Respond to histamine-releasing allergens B. Attack and destroy bacteria and viruses C. Fight against parasitic infections D. Engulf and destroy foreign material to the body

Correct answer: Attack and destroy bacteria and viruses Neutrophils attack and destroy bacteria and viruses. They are also the most common granulocyte. Eosinophils fight against parasitic infections. Basophils respond to histamine-releasing allergens. Macrophages are larger monocytes that engulf and destroy foreign material to the body.

Which of the following are Y- or T-shaped cells that originate in bone marrow and make proteins known as antibodies? A. Y-lymphocytes B. Natural killer cells C. B-lymphocytes D. T-lymphocytes

Correct answer: B-lymphocytes B-lymphocytes are Y- or T-shaped cells that originate in bone marrow and make proteins known as antibodies. B-lymphocytes are also known as B-cells. T-lymphocytes, or T-cells, mature in the thymus, and they directly engulf and destroy pathogens. Natural killer cells, or NK cells, directly attack virus-infected cells. Y-lymphocytes is incorrect, because it is not a type of lymphocyte.

Using the given options, select the meaning of the italicized word. The nurse noted that the patient had halitosis and asked the physician to check the patient's teeth. A. Yellowed teeth B. Chapped lips C. Bad breath D. Drooling

Correct answer: Bad breath The word halitosis means bad breath. If you did not know the meaning of the word, you could use the sentence to help identify the correct answer. The nurse was going to have the physician check the patient's teeth; therefore, you can eliminate chapped lips and drooling, as they would not cause bad breath.

An organelle is composed of which of the following? A. Cells B. Atoms C. Molecules D. Tissues

Correct answer: Molecules Organelles are composed of molecules. The human analogous hierarchy of complexity is as follows: An organism is composed of organ systems; an organ system is composed of organs; an organ is composed of tissues; a tissue is composed of cells; a cell is composed of organelles; an organelle is composed of molecules; and a molecule is composed of atoms.

Choose the sentence that is correctly punctuated. A. Betty had a twenty-two-year-old-poodle. B. Betty had a twenty-two year old poodle. C. Betty had a twenty two year old poodle. D. Betty had a twenty-two-year-old poodle.

Correct answer: Betty had a twenty-two-year-old poodle. Place a hyphen between each word of a spelled-out compound number if it is used as an adjective. This applies to all numbers, starting with twenty-one and going up to ninety-nine. Here are some examples of correct usage: Betty's poodle turned twenty-two today. The dog was twenty-two years old. Betty had her dog for twenty-two years.

The prefix meta- would be used with a word part to indicate which of the following? A. By oneself B. Beyond, after, or with C. Back or again D. Forward or in favor of

Correct answer: Beyond, after, or with The prefix meta- would be used with a word part to indicate beyond, after, or with. For example, metaphor means a word or phrase that has a meaning beyond its true meaning (not a literal meaning). The prefix self- is used to indicate by oneself. The prefix pro- is used to indicate forward or in favor of. The prefix re- is used to indicate back or again.

Which of the following is an example of a compound sentence? A. Jack walked his dog to the park. B. After he woke up late, Mark had to race to get to work. C. Brittany finished reading her nursing school textbook, and then she began reading a fashion magazine. D. Carl and Andrew are not speaking because Andrew forgot to invite Carl to his birthday party.

Correct answer: Brittany finished reading her nursing school textbook, and then she began reading a fashion magazine. "Brittany finished reading her nursing school textbook, and then she began reading a fashion magazine." This is a compound sentence. A compound sentence contains two complete, stand-alone sentences, which are connected by a coordinating conjunction, in this case, and.

Of the following elements, which has the highest ionization energy? A. Manganese (Mn) B. Silver (Ag) C. Potassium (K) D. Bromine (Br)

Correct answer: Bromine (Br) The ionization energy (IE) is qualitatively defined as the amount of energy required to remove the most loosely bound electron of an isolated gaseous atom to form a cation. Of the four choices, bromine (Br) has the highest ionization energy.

Which of the following is not how the periodic table is organized? A. By atomic numbers B. By subatomic particles C. By electron configurations D. By chemical properties

Correct answer: By subatomic particles The periodic table displays the chemical elements organized by their atomic numbers, electron configurations, and recurring chemical properties.

Which option identifies a substance that has a covalent bond? A. NaCl B. Cs3N C. AgCl D. CH4

Correct answer: CH4 CH4 (methane) is a substance that has a covalent bond. For a substance to have a covalent bond, it must be composed of two non-metal elements. The Periodic Table can be reviewed to determine which elements are metal and which elements are non-metal. NaCl, Cs3N, and AgCl all contain ionic bonds, as they are all formed from one metal element and one non-metal element.

Which option identifies the reactants in the chemical equation below? CH4 + 2O2 → CO2 + 2H2O A. CH4, 2O2, CO2, and 2H2O B. 2O2 and 2H2O C. CO2 and 2H2O D. CH4 and 2O2

Correct answer: CH4 and 2O2 The reactants for the chemical equation (CH4 + 2O2 → CO2 + 2H2O) are CH4 and 2O2. A chemical equation shows the substances (reactants) that are being changed into other substances (products). Anything before the arrow are the reactants and anything after the arrow are products (Reactants → Products). CO2 and 2H2O are the products of the chemical equation. CH4, 2O2, CO2, and 2H2O include all the elements from the chemical equation. 2O2 and 2H2O contain one reactant and one product from the chemical equation.

The parathyroid gland is an endocrine system gland located behind the thyroid gland. What does the parathyroid gland help the body control? A. Blood sugar B. Carbohydrate and fat utilization C. Metabolism D. Calcium and phosphorous levels

Correct answer: Calcium and phosphorous levels The parathyroid gland helps the body control calcium and phosphorous levels; therefore, it is vital for proper bone development. Metabolism is controlled by the thyroid gland. The adrenal glands produce a variety of hormones which regulate blood sugar, help the body utilize carbohydrates and fats, distribute stored fat, and promote cardiovascular and gastrointestinal functions.

Which of the following carry blood away from the body in order to exchange nutrients, oxygen, and waste with tissues? A. Arteries B. Arterioles C. Capillaries D. Veins

Correct answer: Capillaries Capillaries carry blood away from the body in order to exchange nutrients, oxygen, and waste with tissues. Veins drain blood from limbs and organs and take blood back to the heart. Arteries carry blood away from the heart. Arterioles are smaller arteries that diverge into capillary beds.

What does COOH symbolize? A. Amino group B. Carboxyl group C. Hydroxyl group D. Carbonyl group

Correct answer: Carboxyl group The carboxyl group (COOH) has both a carbonyl and a hydroxyl group attached to the same carbon atom.

Which of the following is not classified as a disaccharide carbohydrate? A. Cellulose B. Maltose C. Sucrose D. Lactose

Correct answer: Cellulose Cellulose is not a disaccharide carbohydrate; it is a polysaccharide carbohydrate. Disaccharide carbohydrates are sugars that are composed of two monosaccharides such as sucrose, lactose, or maltose.

Which type of bond is formed when one atom, chemical, or element is joined to another? A. Chemical bond B. Hydrogen bond C. Covalent bond D. Ionic bond

Correct answer: Chemical bond A chemical bond is formed when one atom, chemical, or element is joined to another. Ionic bonds and covalent bonds are the two main types of chemical bonds. An ionic bond is formed when two oppositely charged ions are electrostatically attracted. A covalent bond is formed when two atoms share one electron from each atom. A hydrogen bond is formed when a hydrogen atom is attracted to a highly electronegative element.

The epicranius muscle raises one's eyebrows. Where is this muscle located? A. Above the superciliary arch of the frontal bone B. Mandible to orbicularis oris C. Forehead to galea aponeurotica D. Zygomatic bone to angle of mouth

Correct answer: Forehead to galea aponeurotica The epicranius muscle is located from the forehead to the galea aponeurotica. This muscle is responsible for raising one's eyebrows. The zygomaticus major and the zygomaticus minor muscles are located from the zygomatic bone to the angle of the mouth. The corrugator supercilii muscle is located above the superciliary arch of the frontal bone. The depressor labii inferioris muscle is located from the mandible to the orbicularis oris.

Which of the following peptides is produced in the upper small bowel in response to food and gives a feeling of fullness? A. Ghrelin B. Insulin C. Cholecystokinin D. Leptin

Correct answer: Cholecystokinin Cholecystokinin (CCK) is produced in the upper small bowel in response to food and gives a feeling of fullness. It is released soon after food reaches the small bowel. Researchers have found CCK can stop a mouse from eating as soon as it's injected into the brain. Ghrelin is made in the stomach. It stimulates hunger by entering the brain and acting on the neurons in the hypothalamus to increase the activity of the hunger-causing nerve cells and reducing the activity of hunger-inhibiting cells. As the stomach empties, the release of ghrelin increases. As soon as the stomach is filled, it decreases. Leptin is the most powerful appetite-suppressing hormone and is made in fat cells. The more fat cells we have, the more leptin the body produces. Insulin is a peptide that works similarly to leptin; however, it has a weaker influence on the appetite.

What cell structure is responsible for efficiently packaging DNA into a small volume to fit into the nucleus of a cell and protect the DNA structure and sequence? A. Golgi apparatus B. Chromatin C. Smooth endoplasmic reticulum D. Mitochondria

Correct answer: Chromatin Chromatin is comprised of histones and DNA (147 base pairs of DNA wraps around the 8 core histones to form the basic chromatin unit, the nucleosome). The function of chromatin is to efficiently package DNA into a small volume to fit into the nucleus of a cell and protect the DNA structure and sequence. Packaging DNA into chromatin allows for mitosis and meiosis, prevents chromosome breakage and controls gene expression and DNA replication.

Which of the following is an organized structure of DNA and protein found in cells? A. Chromosome B. Neutron C. Gene D. Enzyme

Correct answer: Chromosome A chromosome is an organized structure of DNA and protein found in cells. A gene is a molecular unit of heredity of a living organism. A neutron is a neutral subatomic particle that has no electric charge. An enzyme regulates the rate at which chemical reactions proceed without being altered in the process.

When I buy a lake house, I'm going to enjoy it every weekend. What is the sentence construction for the above sentence? A. Complex B. Compound-complex C. Simple D. Compound

Correct answer: Complex The given sentence is a complex sentence, as it contains one independent clause ("I'm going to enjoy it every weekend") and one dependent clause ("When I buy a lake house"). A complex sentence contains one independent clause and one or more dependent clauses. A compound sentence contains two independent clauses joined by a comma and a coordinating conjunction or by a semicolon. A simple sentence only has one independent clause and no dependent clauses. A compound-complex sentence contains two or more independent clauses and one or more dependent clauses.

No, I do not have a spare car, and because I do not want people asking to borrow it, I will not buy one. What is the sentence construction for the above sentence? A. Complex B. Compound-complex C. Simple D. Compound

Correct answer: Compound-complex The given sentence is a compound-complex sentence, as it contains two independent clauses ("No, I do not have a spare car, and" and "I will not buy one.") and one dependent clause ("because I do not want people asking to borrow it"). A compound-complex sentence contains two or more independent clauses and one or more dependent clauses. A complex sentence contains one independent clause and one or more dependent clauses. A compound sentence contains two independent clauses joined by a comma and a coordinating conjunction or by a semicolon. A simple sentence only has one independent clause and no dependent clauses.

What type of tissue are blood vessels? A. Circulatory B. Muscle C. Connective D. Epithelial

Correct answer: Connective Connective tissue connects the various structures of the body. It usually has its own blood supply, but in some cases, such as with ligaments, it does not. Examples of connective tissue include bone, adipose, blood vessels, and cartilage.

Which of the following can lead to tooth decay and cavities? A. Consumption of oxalates B. Consumption of seafood C. Consumption of salt D. Consumption of carbohydrates

Correct answer: Consumption of carbohydrates Carbohydrates break down into sugar, which feeds bacteria in the mouth and attacks the teeth. The consumption of seafood can lead to gout, as it is rich in uric acid. The consumption of salt can lead to high blood pressure. The consumption of oxalates can lead to the formation of calcium kidney stones.

Which of the following can lead to the formation of calcium kidney stones, which is when the urine contains more crystal-forming substances than urine can dilute? A. Consumption of oxalates B. Consumption of seafood C. Consumption of salt D. Consumption of carbohydrates

Correct answer: Consumption of oxalates The consumption of oxalates can lead to the formation of calcium kidney stones. Oxalates are found in fruits, vegetables, nuts, and chocolate. The consumption of seafood can lead to gout, as it is rich in uric acid. The consumption of carbohydrates can lead to tooth decay, as carbohydrates break down to form sugar. The consumption of salt can lead to high blood pressure.

Which of the following can lead to hypertension, which is high blood pressure? A. Consumption of oxalates B. Consumption of seafood C. Consumption of salt D. Consumption of carbohydrates

Correct answer: Consumption of salt Individuals who has been diagnosed with hypertension become "salt sensitive" and when they consume more salt than what their body needs, their blood pressure rises. The consumption of seafood can lead to gout, as it is rich in uric acid. The consumption of oxalates can lead to the formation of calcium kidney stones. The consumption of carbohydrates can lead to tooth decay, as carbohydrates break down to form sugar.

Which of the following can lead to gout, which is the body's inability to process uric acid? A. Consumption of oxalates B. Consumption of seafood C. Consumption of salt D. Consumption of carbohydrates

Correct answer: Consumption of seafood The consumption of seafood, or other foods rich in uric acid (chocolate or red wine) can cause uric acid build up, which can lead to gout. The consumption of carbohydrates can lead to tooth decay, as carbohydrates break down to form sugar. The consumption of salt can lead to high blood pressure. The consumption of oxalates can lead to the formation of calcium kidney stones.

Which of the following is not classified as a monosaccharide carbohydrate? A. Fructose B. Sucrose C. Galactose D. Glucose

Correct answer: Sucrose Sucrose is not a monosaccharide carbohydrate; it is a disaccharide carbohydrate. Monosaccharide carbohydrates are simple sugars such as glucose, galactose, and fructose.

A lab experiment was designed to test the rate at which plants grow with a specific type of soil. The scientist has 50 plants; 25 receive the specific soil and 25 do not. Sunlight is a factor in this experiment and would be considered what type of variable? A. Independent variable B. Control variable C. None of these D. Dependent variable

Correct answer: Control variable A control variable is something kept constant during an experiment. In this experiment, control variables would be things like sunlight, temperature, type of plant, soil conditions, water, etc. These control variables would need to stay constant throughout the experiment to maintain the cause and effect between the soil and plant growth. An independent variable is what is measured in an experiment as a possible cause. In this experiment, the type of soil is the independent variable. A dependent variable is what is measured in an experiment as a possible effect. In this experiment, the plant growth is the dependent variable.

Which of the following is the term used to describe an object/subject in a study that remains constant throughout the entire study? A. Independent variable B. Variable C. Control variable D. Dependent variable

Correct answer: Control variable Control variable is the term used to describe an object/subject in a study that remains constant throughout the entire study. Variable is the term used to describe an object/subject in a study that changes. Dependent variable is the term used to describe an object/subject in a study that is measured as the object/subject that has an effect on the study's possible cause. Independent variable is the term used to describe an object/subject in a study that is measured as the possible cause to the object/subject's effect.

A physician conducts a study on a patient with a skin condition to see which type of cream is most effective in clearing up the patient's rash. The physician recorded the diameter of each rash spot before and after the treatment, which is reflected in the provided table. What is the independent variable for this experiment? Show Details A. Patient B. Diameter of rash spots C. Creams D. Physician

Correct answer: Creams An independent variable is the object that is being measured as a possible cause. In this experiment the independent variable is the various types of cream being administered because they are being applied to see how they affect the rash spots. Physician is incorrect because he/she is the individual conducting the experiment and not part of the experiment itself. Patient is incorrect because he/she is the controlled variable. Diameter of rash spots is incorrect because it is the dependent variable.

Which of the following is a thick solution that fills each cell and is enclosed by the cell membrane? A. Plasma membrane B. Golgi apparatus C. Cytoplasm D. Ribosomes

Correct answer: Cytoplasm

What is the liquid found inside the cell? A. Plasma membrane B. Cilia C. Cytoplasm D. Cytosol

Correct answer: Cytosol Cytosol is the water-based fluid that is found inside living cells. Organelles, proteins, and other structures of the cell live within the cytosol. The cytoplasm is a thick solution that fills each cell and is enclosed by the cell membrane. It is mainly composed of water, salts, and proteins. In eukaryotic cells, the cytoplasm includes all of the material inside the cell and outside of the nucleus. The plasma membrane is a double layer of lipids that separates the cell interior from the outside environment. This double layer consists largely of specialized lipids called phospholipids. Cilia (singular—cilium) are microscopic, hair-like structures that extend outward from the surface of cells. These structures are important in the cell cycle and replication.

What must first occur before a cell can be divided to grow, develop, and reproduce organisms? A. RNA replication B. DNA replication C. Gene replication D. Chromosome replication

Correct answer: DNA replication DNA replication must first occur before a cell can be divided to grow, develop, and reproduce organisms. DNA replication starts when one double-stranded DNA molecule produces two identical copies of the molecule.

The formula used to calculate density is which of the following? A. Density = Volume x Mass B. Density = Mass/Volume C. Density = Mass + Volume D. Density = Volume/Mass

Correct answer: Density = Mass/Volume The formula used to calculate density is: Density = Mass/Volume. For instance, if a substance's mass is 10 g and its volume is 2.5 cm3, the substance's density will be 4 g/cm3. (10 g / 2.5 cm3 = 4 g/cm3) The other options do not correctly reflect the formula used to calculate density.

Which of the following codes genetic information for the transmission of inherited traits? A. Ribonucleic acid B. Amino acid C. Carboxylic acid D. Deoxyribonucleic acid

Correct answer: Deoxyribonucleic acid Deoxyribonucleic acid (DNA) codes genetic information for the transmission of inherited traits. RNA, ribonucleic acid, is the first intermediate in converting the information from DNA into proteins essential for the working of a cell. Carboxylic acids are any class of organic compounds and amino acids are any group of organic molecules.

Smooth ER is the endoplasmic reticulum (ER) section that is not covered with ribosomes. What is the smooth ER responsible for? A. Intracellular digestion B. Production of cell energy C. Detoxification and metabolism of various molecules D. Membrane production and protein synthesis

Correct answer: Detoxification and metabolism of various molecules Smooth ER is responsible for the detoxification and metabolism of various molecules. Rough ER is responsible for membrane production and protein synthesis. Lysosomes are responsible for intracellular digestion. The mitochondria is responsible for the production of cell energy.

Which of the following is the weakest intermolecular force? A. Dispersion force B. Hydrogen bond C. Covalent bond D. Dipole-dipole interaction

Correct answer: Dispersion force A dispersion force is the weakest intermolecular force. Intermolecular forces are attractions between whole molecules, not atoms within a molecule. Hydrogen bonds are the strongest intermolecular forces. Dipole-dipole interactions are weak intermolecular forces, but not the weakest. Covalent bonds are chemical bonds that form between atoms within a molecule.

The metric system is used by scientists to record data. If a scientist uses amperes (A) as the metric unit to record data, what is the scientist measuring? A. Luminous intensity B. Temperature C. Chemical substance D. Electric current

Correct answer: Electric current If a scientist uses amperes (A) as the metric unit to record data, the scientist is measuring electric current. If a scientist uses Celsius (C) as the metric unit to record data, the scientist is measuring temperature. If a scientist uses mole (mol) as the metric unit to record data, the scientist is measuring chemical substances. If a scientist uses candela (cd) as the metric unit to record data, the scientist is measuring luminous intensity.

In regard to the periodic table, which of the following occurs as you move from the top to the bottom of the periodic table? A. Electronegativity decreases B. Electronegativity increases C. Atomic radius decreases D. Atomic radius remains constant

Correct answer: Electronegativity decreases The electronegativity decreases as you move from the top to the bottom of the periodic table. This occurs because the distance between the valence electrons and the atomic nucleus increases as you move towards the bottom of the periodic table. Atomic radius decreases as you move from the left to the right across the periodic table. Atomic radius increases as you move from the top to the bottom of the periodic table. Electronegativity increases as you move from the left to the right across the periodic table.

Which type of solution combines readily separate matter? A. Amalgams B. Emulsions C. Alloys D. Compounds

Correct answer: Emulsions Emulsions are solutions that combine readily separate matter. An example of an emulsion is water and oil, as these two types of matter readily separate. Compounds are solutions that create a single matter by mixing different elements. Alloys are solutions that make a new type of metal by combining solid solutions of other metals. Amalgams are solutions that use mercury to dissolve another metal type.

A college student is writing a paper for her English class and she needs to conduct some research on killer whales. Which of the following resources would be the most appropriate in this particular situation? A. Encyclopedia Britannica B. Write for College: A Student Handbook C. Collins English Thesaurus D. Merriam-Webster Dictionary

Correct answer: Encyclopedia Britannica The student's goal is to research killer whales; therefore, the student would want to use a resource that would help her find out more information on killer whales and Encyclopedia Britannica would be the best choice, as an encyclopedia provides information on various subjects. The student would use a dictionary if she wanted to look up the spelling of a word. The student would use a thesaurus if she wanted to look up words that were synonyms or antonyms to a particular word. The student would use a college writing handbook if she wanted to learn how to verify grammar usage, citations, and formatting.

Which body system is responsible for regulating metabolism? A. Cardiovascular system B. Gastrointestinal system C. Endocrine system D. Integumentary system

Correct answer: Endocrine system The endocrine system is a set of organs that secrete hormones directly into the circulatory system. Its principle functions are hormone production and internal communication and coordination. The major glands in the endocrine system are the pineal, hypothalamus, pituitary, thyroid and parathyroid, thymus, adrenal, pancreas, and ovaries or testes. These glands send hormones through the blood to other organs and tissues in the body to control the function of that organ.

It is known that the gene that codes for male pattern baldness depends on the gene for red hair. This type of interaction between alleles is known as which of the following? A. Genotype B. Affectation C. Epistasis D. Phenotype

Correct answer: Epistasis Epistasis is a phenomenon that consists of the effect of one gene being dependent on the presence of one or more 'modifier genes' (genetic background). Similarly, epistatic mutations have different effects in combination than individually.

Which kind of tissue does not have its own blood supply? A. Nervous B. Muscle C. Connective D. Epithelial

Correct answer: Epithelial Epithelial tissue has two functions. The first is that it covers, such as with skin. The second function is to produce secretions, such as with glandular tissue. It does not have its own blood supply and is frequently found in layers. This tissue will regenerate easily if it is well-nourished, typically by capillaries located nearby.

Sharon is looking up the word "eulogy" in a dictionary. Which of the following would be the guide words that would appear at the top of the dictionary page containing the word "eulogy"? A. estrus and Etruria B. Etruscan and Eustachian tube C. excoriate and exhilarate D. euthanasia and evermore

Correct answer: Etruscan and Eustachian tube The word "eulogy" would be found on the dictionary page that uses "Etruscan" and "Eustachian tube" as its guide words, as "eul" comes after "etr" and before "eus". "Eul" comes before both "eut" and "eve". "Eul" comes before both "exc" and "exh". "Eul" comes after both "est" and "etr".

Which of the following deliberately imposes a treatment on a group of objects in order to observe the response? A. Experiment B. Treatment C. Data D. Factor

Correct answer: Experiment An experiment deliberately imposes a treatment on a group of objects in order to observe the response. Treatment is incorrect because it is something that is administered on or to experimental objects. Factor is incorrect because it is a controlled independent variable used during research. Data is incorrect because it is a collection of responses from an imposed treatment on a group of objects.

Identify the reduction in the following redox reaction: Fe2O3 + 3CO ----> 2FeO + 3CO2. A. Fe2O3 --> 2FeO B. 3CO --> 2FeO C. Fe2O3 --> 3CO2 D. 3CO --> 3CO2

Correct answer: Fe2O3 --> 2FeO A reduction is a loss of oxygen. Since Fe2O3 loses oxygen to become FeO, it is a reduction.

Scientists believe that talking to or playing music around plants make the plants grow faster. To prove this hypothesis, the scientists setup three greenhouses that each contained 50 tomato plants that were two inches tall. The first greenhouse was kept completely quiet. The second greenhouse played music 24 hours a day. The third greenhouse played the news or sitcoms 24 hours a day. At the end of the eighth week, it was found that the tomato plants in the first greenhouse were five inches tall, the tomato plants in the second greenhouse were eight inches tall, and the tomato plants in the third greenhouse were seven inches tall. Which of the following identifies the study's dependent variable? A. Quietness, music, and television B. Number of tomato plants C. Final height of the tomato plants D. Greenhouses

Correct answer: Final height of the tomato plants A dependent variable is the object that is being measured as a possible effect. The study's dependent variable is the final height of the tomato plants. Greenhouses and the number of tomato plants are the study's controlled variables. Quietness, music, and television are the study's independent variables.

Which type of bone is not hollow but contains marrow? A. Short bone B. Long bone C. Irregular bone D. Flat bone

Correct answer: Flat bone

In which of the following phases of matter do molecules exert little or no attraction to one another because they move at high speeds? A. Gas B. Solid C. Liquid D. Plasma

Correct answer: Gas Gas is the phase of matter in which molecules exert little or no attraction to one another because they move at high speeds. Solid is the phase of matter in which molecules exert a strong attraction to one another, as they move slowly relative to one another. Plasma is the phase of matter that is made up of electrons and positive ions. Liquid is the phase of matter in which molecules exert moderate attractions to one another, as they move at moderate speeds.

Which of the following peptides is most likely to make an individual feel hungry? A. Ghrelin B. Insulin C. Cholecystokinin D. Leptin

Correct answer: Ghrelin Ghrelin is made in the stomach. It stimulates hunger by entering the brain and acting on the neurons in the hypothalamus to increase the activity of the hunger-causing nerve cells and reducing the activity of hunger-inhibiting cells. As the stomach empties, the release of ghrelin increases. As soon as the stomach is filled, it decreases. Cholecystokinin (CCK) is produced in the upper small bowel in response to food and gives a feeling of fullness. It is released soon after food reaches the small bowel. Researchers have found CCK can stop a mouse from eating as soon as it's injected into the brain. Leptin is the most powerful appetite-suppressing hormone and is made in fat cells. The more fat cells we have, the more leptin the body produces. Insulin is a peptide that works similarly to leptin; however, it has a weaker influence on the appetite.

Which two items react during cellular respiration? A. Glucose and water B. Carbon dioxide and water C. Carbon dioxide and oxygen D. Glucose and oxygen

Correct answer: Glucose and oxygen Cellular respiration is a set of metabolic reactions and processes that take place in the cells of organisms to convert biochemical energy from nutrients into adenosine triphosphate (ATP), and then release waste products. During cellular respiration, glucose and oxygen react to produce carbon dioxide, water, and energy. During photosynthesis, carbon dioxide and water react to produce glucose and oxygen.

The process of developing various blood cells from pluripotent stem cells is known as which of the following? A. Thrombopoiesis B. Erythropoiesis C. Phagocytosis D. Hematopoiesis Hide Explanation Next Question

Correct answer: Hematopoiesis Hematopoiesis is the process of developing various blood cells from pluripotent stem cells. Pluripotent stem cells are primitive cells that can produce another cell identical to itself and can generate subsets of mature cells. Phagocytosis is the process in which a white blood cell eats aging red blood cells and releases the contents into the blood. Erythropoiesis is the production of red blood cells. Thrombopoiesis is the process in which platelets are produced within bone marrow.

Which type of individuals have two different alleles, such as Aa? A. Genotype B. Phenotype C. Heterozygous D. Homozygous

Correct answer: Heterozygous Homozygous individuals have two identical alleles, such as AA or aa. The genotype is an allele that an individual possesses for a particular trait, and the phenotype is an observable trait that a particular individual possesses.

Which type of chemical bond has a weak attraction between polarized molecules? A. Hydrogen bond B. Van der Waals force C. Covalent bond D. Ionic bond

Correct answer: Hydrogen bond A hydrogen bond has a weak attraction between polarized molecules. A covalent bond is a chemical bond that shares one or more pairs of electrons between nuclei. An ionic bond is a chemical bond that has a relatively weak attraction between an anion and a cation. A Van der Waals bond is a chemical bond that has a weak attraction due to random disturbances in the electron clouds of adjacent atoms; it is also the weakest of all bonds.

The thyrotrophic-releasing, growth hormone-releasing, corticotrophin-releasing, and gonadotropin-releasing hormones are released by which of the following endocrine system glands? A. Hypothalamus B. Pituitary gland C. Pineal gland D. Thymus

Correct answer: Hypothalamus The endocrine system is a set of organs that secrete hormones directly into the circulatory system. Its principle functions are hormone production and internal communication and coordination. The major glands in the endocrine system are the pineal, hypothalamus, pituitary, thyroid and parathyroid, thymus, adrenal, pancreas, and ovaries or testes. These glands send hormones through the blood to other organs and tissues in the body to control the function of that organ. The thyrotrophic-releasing, growth hormone-releasing, corticotrophin-releasing, and gonadotropin-releasing hormones are released by the hypothalamus. The hypothalamus is able to control the pituitary hormones by releasing these hormones. The pineal gland releases melatonin. The thymus secretes humoral factors. The pituitary gland produces growth hormones.

Which of the following is considered a simple sentence? A. I feel too ill to walk; I feel too ill to talk. B. I was too sick to go to school, but I wasn't too sick to go to the dance. C. I must have caught a cold from the sick children on the bus. D. I usually don't mind missing work, but this is not fun.

Correct answer: I must have caught a cold from the sick children on the bus. The option that is a simple sentence is: I must have caught a cold from the sick children on the bus. A simple sentence has only one independent clause, and it has no dependent clause. The other options are all examples of compound sentences, as they consist of two independent clauses and are joined by a comma and a coordinating conjunction or by a semicolon.

Select the sentence with correct grammar. A. He would have postponed his trip to the beach, if he would have known about the rain. B. He would have postponed his trip to the beach had he knew about the rain. C. If he had known about the rain, he would have postponed his trip to the beach. D. If he knew about the rain, he would have postponed his trip to the beach.

Correct answer: If he had known about the rain, he would have postponed his trip to the beach. When talking about a situation that didn't happen, the third conditional is used. This indicates an event from the past that is impossible because it is in the past.

Which unit of measure is most appropriate when measuring the diameter of a diamond? A. Millimeters B. Kilograms C. Kilometers D. Milliliters

Correct answer: Millimeters The unit of measure that is most appropriate when measuring the diameter of a diamond is millimeters, as millimeters measures the length/diameter of very small items. Kilometers is incorrect because it is used to measure the length of long distances. Milliliters is incorrect because it is used to measure very small volumes. Kilograms is incorrect because it is used to measure the weight of larger objects.

Which option is written in second person? A. If you are going shopping today, please buy a gallon of milk. B. I'm going to the grocery store today to buy a gallon of milk. C. We need to buy a gallon of milk today when we are at the store. D. He bought a gallon of milk today when he was at the store.

Correct answer: If you are going shopping today, please buy a gallon of milk. To identify which sentence is written in second person, you must look at the pronouns used in each sentence. Second person pronouns name the person or persons spoken to (i.e., you or your). Therefore, the sentence written in second person is: If you are going shopping today, please buy a gallon of milk. "He bought a gallon of milk today when he was at the store" is written in third person. The sentences: "I'm going to the grocery store today to buy a gallon of milk" and "We need to buy a gallon of milk today when we are at the store" are written in first person.

Which body system is responsible for preventing the entry of pathogens through the presence of barriers? A. Immune system B. Respiratory system C. Endocrine system D. Integumentary syste

Correct answer: Immune system The role of the immune system (a collection of structures and processes within the body) is to protect against disease or other potentially damaging foreign bodies. When functioning properly, the immune system identifies a variety of threats, including viruses, bacteria, and parasites, and distinguishes them from the body's own healthy tissue. There are two major components of the immune system: innate and adaptive (acquired). The immune system functions through interactions with several other systems through which pathogens can enter the body via lymph nodes. These lymph nodes contain a large number of antigen-presenting cells that can trigger the adaptive immune system. There are two major components of the immune system: innate and adaptive (acquired). The immune system functions through interactions with several other systems through which pathogens can enter the body via lymph nodes. These lymph nodes contain a large number of antigen-presenting cells that can trigger the adaptive immune system.

The prefix vice- would be used with a word part to indicate which of the following? A. In place of B. From or away C. Beneath D. Not or without

Correct answer: In place of The prefix vice- would be used with a word part to indicate in place of. For example, vice president is in place of the president. The prefix ab- is used to indicate from or away. The prefix an- is used to indicate not or without. The prefix infra- is used to indicate beneath.

Protein synthesis begins with a process known as transcription. Where does this process occur? A. In the cytoplasm B. In the nuclear envelope C. In the ribosome unit D. In the nucleus

Correct answer: In the nucleus The transcription process occurs in the nucleus. During transcription, a single RNA strand is formed, which is called messenger RNA (mRNA). Translation occurs in the cytoplasm.

A graph shows that each year Susan's income goes up by a certain percentage. Which factor is dependent? A. Income B. Percentage C. Year D. Rate of change

Correct answer: Income A dependent variable is a variable that depends on at least one other variable. An independent variable is a variable that determines the value of another variable. The percentage and rate of change remain constant, while the year is independent of any other factors. Susan's income is dependent because the percentage changes depending on the year.

A lab experiment was designed to test the rate at which plants grow with a specific type of soil. The scientist has 50 plants; 25 receive the specific soil and 25 do not. What type of variable is the soil in this experiment? A. Independent variable B. Control variable C. None of these D. Dependent variable

Correct answer: Independent variable An independent variable is what is measured in an experiment as a possible cause. In this experiment, the type of soil is the independent variable. A dependent variable is what is measured in an experiment as a possible effect. In this experiment, the plant growth is the dependent variable. A control variable is something kept constant during an experiment. In this experiment, control variables would be things like sunlight, temperature, type of plant, soil conditions, water, etc. These control variables would need to stay constant throughout the experiment to maintain the cause and effect between the soil and plant growth.

Within the cardiovascular (circulatory) system, there are two well-integrated systems: the closed circulatory system and the open circulatory (lymphatic) system. Which of the following does the open circulatory system circulate and filter between cells? A. Blood B. All of these C. Electrical signals D. Interstitial fluid

Correct answer: Interstitial fluid The cardiovascular (circulatory) system is responsible for the movement of blood and lymph around the body. This allows for nutrient distribution, waste removal, communication, and protection. The cardiovascular system includes the heart, arteries, veins, plasma, lymph, lymphocytes, leukocytes, hemoglobin, and capillaries.

The protein synthesis process ends when the chain is ended at the stop codon. Where does the chain go from this point? A. Into the nucleus B. Into the cytoplasm C. Into the nuclear envelope D. Into the ribosome unit

Correct answer: Into the cytoplasm When the chain that is formed during protein synthesis ends at the stop codon, it goes into the cytoplasm. Once the chain goes into the cytoplasm, the protein folds and forms a complete conformation.

Which type of chemical bond has a relatively weak attraction between an anion and a cation? A. Hydrogen bond B. Van der Waals force C. Covalent bond D. Ionic bond

Correct answer: Ionic bond An ionic bond is a chemical bond that has a relatively weak attraction between an anion and a cation. A covalent bond is a chemical bond that shares one or more pairs of electrons between nuclei. A hydrogen bond is a chemical bond that has a weak attraction between polarized molecules. A Van der Waals bond is a chemical bond that has a weak attraction due to random disturbances in the electron clouds of adjacent atoms; it is also the weakest of all bonds.

View the supporting details to answer the following question. Which element requires the highest temperature before it will begin to boil? Show Details A. Bismuth B. Sodium C. Iridium D. Cobalt

Correct answer: Iridium The element that requires the highest temperature before it will begin to boil is iridium. This question requires you to know the definition of boiling point and to be able to use a table to identify the information requested. Since the table identifies iridium as having the highest boiling point temperature (4527°C), it is the element that requires the highest temperature before it will begin to boil. The other options are incorrect because they all have a lower boiling point temperature than iridium

Increasing the concentration is a way to increase the reaction rate of a chemical reaction. How does increasing the concentration accomplish this? A. It reduces the amount of energy required for a reaction to occur B. It increases the chances of a collision between reactants and produces more products C. It increases the chance of contact by causing particles to move around faster due to greater kinetic energy D. It increases the opportunity for particles to come into contact with one another

Correct answer: It increases the chances of a collision between reactants and produces more products Increasing the concentration is a way to increase the reaction rate of a chemical reaction because the increased concentration increases the chances of a collision between reactants and it produces more products. Increasing the temperature increases the chance of contact by causing particles to move around faster due to greater kinetic energy. Increasing the surface area increases the opportunity for particles to come into contact with one another. A catalyst reduces the amount of energy required for a reaction to occur.

What characteristic of water allows for hydrogen bonding between molecules? A. Its covalent bonds B. Its cohesive properties C. Its high specific heat D. Its polar nature

Correct answer: Its polar nature Although all the other characteristics regarding water are true, water's polar nature is what allows for hydrogen bonding between molecules.

What allows water to act as a versatile solvent? A. Its polarity B. Its high specific heat value C. Its hydrogen bonding D. Its cohesive and adhesive properties

Correct answer: Its polarity

Which sentence would most likely indicate a setting in the United States in the 1920s? A. It isn't uncommon for the young generation to boogie all night. B. The young boy was running from the heat. C. Jane thought the new clothesline was the berries. D. The teacher needed a break from the ankle biters.

Correct answer: Jane thought the new clothesline was the berries. The sentence that would most likely indicate a setting in the United States in the 1920s is: "Jane thought the new clothesline was the berries." The use of "berries" in the sentence is a slang word that was used in the 1920s to mean something is good. "The young boy was running from the heat" indicates a setting from the 1950s, as "heat" is a slang word used in 1950s to refer to the police. "The teacher needed a break from the ankle biters" indicates a setting from the 1960s, as "ankle biters" is a slang word used in the 1960s to refer to young children. "It isn't uncommon for the young generation to boogie all night" indicates a setting from the 1970s, as "boogie" is a slang word used in the 1970s to refer to dancing.

Which of the following is an example of correct pronoun-antecedent agreement? A. Johnny Depp is frequently considered to be an excellent actor. He is perhaps best known for his role as Captain Jack Sparrow. B. The movie was long and boring. She took too long to bring the story to a close. C. A person must be truly dedicated to break a habit. It must work hard to overcome obstacles. D. The truck was large and imposing. He boasted a deep red exterior.

Correct answer: Johnny Depp is frequently considered to be an excellent actor. He is perhaps best known for his role as Captain Jack Sparrow. Pronoun-antecedent agreement is matching like numbers or pronouns and their antecedents: singular with singular, plural with plural. "Johnny Depp is frequently considered to be an excellent actor. He is perhaps best known for his role as Captain Jack Sparrow." In this sentence, Johnny Depp is the antecedent and he is the pronoun. Both are in agreement. "A person must be truly dedicated to break a habit. It must work hard to overcome obstacles." The antecedent is person while the pronoun is it. These two words are not in agreement. "The truck was large and imposing. He boasted a deep red exterior." The antecedent is truck and the pronoun is he. These two words are not in agreement. He should be replaced with it. "The movie was long and boring. She took too long to bring the story to a close." The antecedent is movie and the pronoun is she. The pronoun cannot be assigned to something inanimate. She should be replaced with it.

View the supporting details to answer the following question. What can logically be inferred from this passage? Show Details A. Juan needed medical attention for his injury B. Juan will require months of physical therapy C. Juan was struck by a car D. Juan has caring par

Correct answer: Juan needed medical attention for his injury A logical conclusion is a decision made based on the logic presented. All that can be concluded from this passage is that Juan needed medical attention for his injury. We don't know how he broke his arm or how long the recovery will take.

Which unit of measure is most appropriate when measuring the mass of a child? A. Kiloliters B. Centimeters C. Grams D. Kilograms

Correct answer: Kilograms The unit of measure that is most appropriate when measuring the mass of a child is kilograms, as kilograms is used to measure the weight of heavier objects. Grams is incorrect because it is used to measure the weight of small, light-weight objects. Centimeters is incorrect because it is used to measure small lengths. Kiloliters is incorrect because it is used to measure large volumes.

Which of the following produces nicotinamide adenine dinucleotide (NADH) and flavin adenine dinucleotide (FADH2) for the electron transport chain during cellular respiration? A. Glycolysis B. Metabolic pathways C. Metabolism D. Krebs cycle

Correct answer: Krebs cycle The Krebs cycle produces nicotinamide adenine dinucleotide (NADH) and flavin adenine dinucleotide (FADH2) for the electron transport chain during cellular respiration. Glycolysis is the first process step of the conversion of glucose to pyruvate. Metabolism is the sum of all chemical reactions that occur within an organism. Metabolic pathways are the series of actions that take place in a cell.

Which of the following words is spelled correctly? A. Lightted B. Lighttid C. None of these D. Lighted

Correct answer: Lighted When adding a suffix (-ed) to a root word that ends in a single consonant, double the consonant if a single vowel directly precedes the consonant and the consonant ends with an accented syllable or one-syllable word. In this case, light ends with a single consonant (t) and a single vowel does not directly precede this consonant; instead, a consonant (h) precedes it. Therefore, you would not double the final consonant (t) and the proper spelling would be lighted. To summarize, this rule is applied when four things are true: Does the word end in a single consonant? Does the word have only one directly preceding vowel? Does the suffix you are going to add begin with a vowel? Is the last syllable accented? In some cases, there isn't a definitive spelling for a word when it comes to this double the consonant rule. Examples include traveling/travelling, canceled/cancelled, profitable, worshiped.

Fatty acids, phospholipids, and steroids are classified as which of the following? A. Nucleic acids B. Proteins C. Carbohydrates D. Lipids

Correct answer: Lipids Fatty acids, phospholipids, and steroids are classified as lipids. Lipids are proteins composed predominately of hydrogen and carbon, and are often referred to as "fats." Lipids such as fats, oils, and adipose store energy efficiently. Carbohydrates are sugars and starches which the body breaks down into glucose. Carbohydrate functions include structural function, energy storage, and recognition molecules. Proteins are molecules composed of amino acids joined by peptide bonds. Protein monomers are called amino acids. There are 20 different types of amino acids with different chemical properties based on their side groups. They all share an amino group and a carboxylic acid group. Nucleic acids are long molecules made of nucleotides; deoxyribonucleic acid (DNA) and ribonucleic acid (RNA).

Above the critical point, which phases of matter coexist? A. Solid and gas B. Solid, liquid, and gas C. Solid and liquid D. Liquid and gas

Correct answer: Liquid and gas Above the critical point is where the liquid and gas phases of matter coexist. The critical point is the point on a phase diagram in which the substance is indistinguishable between the liquid and gaseous phases. The other options are incorrect because only the liquid and gaseous phases coexist above the critical point.

Which of the following is the weakest of all the intermolecular forces? A. London dispersion forces B. Intermolecular forces C. Dipole-Dipole interactions D. Hydrogen bonds

Correct answer: London dispersion forces London dispersion forces (LDF) or dispersion forces are the weakest of all the intermolecular forces. The London dispersion force is a temporary attractive force that results when the electrons in two adjacent atoms occupy positions that make the atoms form temporary dipoles. LDF is sometimes called instantaneous dipole-induced dipole forces and are part of the van der Waals forces.

An oxidized agent does which of the following? A. Gains electrons B. Loses electrons C. Gains atoms D. Loses atoms

Correct answer: Loses electrons An oxidized agent loses electrons. Oxidation is described as the loss of electrons. An oxidizing agent gains electrons, and it is known as the oxidant.

Bones consist of two types of bone marrow: yellow bone marrow and red bone marrow. What is yellow bone marrow responsible for? A. Releasing oxygen to the heart, muscle, and brain tissues B. Forming all blood cells except lymphocytes C. Working with the liver and spleen to obliterate old red blood cells D. Maintaining an environment that allows the bone to function

Correct answer: Maintaining an environment that allows the bone to function Yellow bone marrow is responsible for maintaining an environment that allows the bone to function. Yellow bone marrow also acts as a store for fats. Red bone marrow is responsible for working with the liver and spleen to obliterate old red blood cells and for forming all blood cells except lymphocytes. Hemoglobin, a protein found in red blood cells, is responsible for releasing oxygen to the heart, muscle, and brain tissues.

The pancreas is an endocrine system gland primarily responsible for which of the following? A. Distribution of stored fat B. Proper bone development C. Maintaining healthy blood sugar levels D. Metabolism control

Correct answer: Maintaining healthy blood sugar levels

Which type of bias occurs when the person assessing the experiment's outcomes know or is connected to the experiment's treatments? A. Measurement bias B. Response bias C. Performance bias D. Selection bias

Correct answer: Measurement bias Measurement bias occurs when the person assessing the experiment's outcomes know or is connected to the experiment's treatments. Performance bias is incorrect because it occurs when something effects how the treatments or interventions are delivered. Selection bias is incorrect because it occurs when the participants used for the study are not equally or randomly assigned to the control group. Response bias is incorrect because it occurs when only certain types of individuals respond to an invitation to participate in the experiment.

Which of the following helps support and give shape to the cell? A. Microtubules B. Microfilaments C. Cilia D. Microvilli

Correct answer: Microtubules Microtubules are hollow, fibrous shafts whose main function is to help support and give shape to the cell. They also serve a transportation function, as they are the routes upon which organelles move through the cell. They are most often found in all eukaryotic cells and, together with the microfilaments and intermediate filaments, form the cytoskeleton.

What structure of the cell is like tiny, finger-like extensions of the plasma membrane that increases cell's surface area? A. Microtubules B. Microfilaments C. Cilia D. Microvilli

Correct answer: Microvilli Microvilli (singular—microvillus) are very tiny finger-like extensions of the plasma membrane that project from a free or exposed cell surface. The microvilli greatly increase the amount of surface area for a cell. Cilia (singular—cilium) are microscopic, hair-like structures that extend outward from the surface of cells. These structures are important in the cell cycle and replication.

Choose the sentence that is correctly punctuated. A. Mike is a fast runner; he is good at the high jump too. B. Mike is a fast runner; he is good at the high jump, too. C. Mike is a fast runner, he is good at the high jump too. D. Mike is a fast runner, he is good at the high jump, too.

Correct answer: Mike is a fast runner; he is good at the high jump, too. Place a semicolon between two independent but related clauses. Place a comma before ending a sentence with the word too when it's used as an adverb meaning also or in addition. Examples: "We're going shopping, out to dinner, and then to a movie, too." This is proper use of a comma before the word too. "I like bananas too." In a simple sentence like this, you do not need a comma before the word too.

When measuring the dose of a liquid medicine, which unit of measure is most appropriate? A. Kilogram B. Kiloliter C. Milligram D. Milliliter

Correct answer: Milliliter When measuring the dose of a liquid medicine, the unit of measure that is most appropriate is milliliter. A milliliter is 1/1,000th (one-thousandth or 1x10-3) of a liter. Liter is the unit of measure used to measure volume. Kiloliter is incorrect because it is 1,000 times a liter and would be used to measure large volumes of liquid. Milligram and kilogram are incorrect because they are both used to measure mass.

Which of the given sentences acts most like a transition sentence? A. Robin was really craving ice cream, but she did not have any ice cream at her house. B. Robin decided that she would drive to the grocery store to pickup a quart of ice cream and a box of ice cream cones. C. Needless to say, Robin went to the grocery store to pick up the ice cream that she was initially craving and ended up coming home with additional items. D. Once Robin arrived at the grocery store, she found a few more items that she needed and ended up spending sixty dollars.

Correct answer: Needless to say, Robin went to the grocery store to pick up the ice cream that she was initially craving and ended up coming home with additional items. A transition (closing) sentence reminds the reader of the topic, summarizes the paragraph, and transitions to the next paragraph. The sentence that acts most like a transition sentence is: "Needless to say, Robin went to the grocery store to pick up the ice cream that she was initially craving and ended up coming home with additional items." The sentence: "Robin was really craving ice cream, but she did not have any ice cream at her house." is a topic sentence. The sentences: "Robin decided that she would drive to the grocery store to pickup a quart of ice cream and a box of ice cream cones." and "Once Robin arrived at the grocery store, she found a few more items that she needed and ended up spending sixty dollars." are supporting sentences.

All except which sentence has correct pronoun-antecedent agreement? A. As the hasty crowd grew, it congested the streets. B. Neither Bryan nor Roger had their library card. C. The two children are finishing their list of chores. D. Each of the girls minds her manners.

Correct answer: Neither Bryan nor Roger had their library card. The sentence that does not have correct pronoun-antecedent agreement is: "Neither Bryan nor Roger had their library card." When a sentence contains two or more singular antecedents ("Bryan" and "Roger") joined by or or nor, the antecedents are also referred to by a singular pronoun (his not their). The correct way to write the sentence is: "Neither Bryan nor Roger had his library card." The other sentence options are all written correctly, as the singular pronoun "it" correctly reflects the singular antecedent "crowd," the plural pronoun "their" correctly reflects the plural antecedent "children," and the singular pronoun "her" correctly reflect the singular antecedent "each."

Which type of tissue does myelin work to protect? A. Cardiac B. Nervous C. Muscle D. Connective

Correct answer: Nervous Nervous tissue makes up the structure of the brain, nerves, and spinal cord. Neurons make up the nerves and send electrical signals throughout the body. Certain specialized support cells, such as myelin, work to protect nervous tissue.

What is the communication between the peripheral nervous system (PNS) and the central nervous system (CNS) called? A. Neuronal signaling B. Blood flow C. Neuron signals D. Neutron flow

Correct answer: Neuronal signaling The purpose of the nervous system is to communicate information from the peripheral nervous system (PNS) to the central nervous system (CNS) and then to process the information in the CNS and send it back to the PNS. This transfer of information from the external environment, through neurons, and back again to the external environment is known as neuronal signaling

Which of the following has no charge at all? A. Electrons B. Protons C. Neutrons D. Atoms

Correct answer: Neutrons Atoms contain protons, electrons, and neutrons. Protons have a positive electrical charge. Protons are found within an atom's nucleus. Electrons have a negative charge. Neutrons do not have a charge at all.

What molecule is responsible for the base pairing action in DNA? A. Sugar molecules B. Nitrogenous bases C. None of these D. Phosphate groups

Correct answer: Nitrogenous bases Base pairs are formed by hydrogen bonds between the nitrogenous bases (ATGC). Deoxyribonucleic acid (DNA) is a macromolecule that contains coded instructions for the body to produce proteins. It is composed of four nucleotide letters: A (adenine), T (thymine), G (guanine), and C (cytosine). These nucleotides are arranged in three-letter combinations to make 64 possible "words" called codons. A gene is a "sentence" made of a specific order of codons that produces a protein. Each codon specifies one amino acid and these codons instruct ribosomes to assemble the amino acids in a particular order. A chromosome is a structure made of protein and one molecule of DNA. Chromosomes regulate where a gene starts and ends and which genes are read in a cell. The relationships between the bases are always constant. Adenine and thymine always bond (A-T) and guanine and cytosine always bond (G-C). Thus, A-T and G-C are referred to as complementary bases. Adenine will bind to Uracil only in RNA.

Prokaryotic cells are cells that have which of the following? A. A defined nucleus and a series of membrane-bound organelles B. A defined nucleus and no membrane-bound organelles C. No defined nucleus and a series of membrane-bound organelles D. No defined nucleus and no membrane-bound organelles

Correct answer: No defined nucleus and no membrane-bound organelles There are two types of cells, which are known as prokaryotic and eukaryotic. Prokaryotic cells are cells that have no defined nucleus and no membrane-bound organelles. Eukaryotic cells have a defined nucleus and a series of membrane-bound organelles.

Which of the following element properties has a complete valence shell? A. Actinides B. Noble gases C. Lanthanides D. Halogens

Correct answer: Noble gases Noble gases have a complete valence shell, which makes them relatively nonreactive. Halogens have seven valence electrons and are highly reactive. Both lanthanides and actinides are very reactive; therefore, they would not have a complete valence shell.

If an author writes a narrative, which signal phrase would the author most likely use? A. Not long ago B. In the same way C. Made possible by D. A solution

Correct answer: Not long ago The phrase "not long ago" is a signal that the author is writing a narrative. Other signal words and phrases used for narratives are: abruptly, after a few days, gradually, instantly, from this point, this instant, until now, sporadically, on the next occasion, previously, and recently. "A solution" is a signal phrase for a problem/solution. "Made possible by" is a signal phrase for cause and effect. "In the same way" is a signal phrase for compare/contrast.

Which of the following is not a type of natural lipid? A. Supersaturated B. Polyunsaturated C. Saturated D. Unsaturated

Correct answer: Supersaturated There are three types of natural lipids: unsaturated, polyunsaturated, and saturated. Supersaturation is a not a naturally occurring lipid. Unsaturated and polyunsaturated lipids have one or more double bonds between carbon atoms of fatty acid chains; saturated lipids share no such double bonds. A common example of supersaturation is rock candy, which is created from a supersaturated sugar solution.

Which of the following synthesizes and assembles ribosomes? A. Golgi apparatus B. Chromatin C. Nucleolus D. Mitochondria

Correct answer: Nucleolus The nucleolus makes ribosomal subunits from proteins and ribosomal RNA (rRNA). It then sends the subunits out to the rest of the cell where they combine into complete ribosomes. Ribosomes make proteins; therefore, the nucleolus plays a vital role in making proteins in the cell. Chromatin is comprised of histones and DNA (147 base pairs of DNA wraps around the 8 core histones to form the basic chromatin unit, the nucleosome). The function of chromatin is to efficiently package DNA into a small volume to fit into the nucleus of a cell and protect the DNA structure and sequence. Packaging DNA into chromatin allows for mitosis and meiosis, prevents chromosome breakage and controls gene expression and DNA replication. The Golgi apparatus functions as an organelle found within the cells of the majority of eukaryotic organisms. The Golgi body is found within the cytoplasm of the cell and is part of the endomembrane system. The Golgi apparatus is sometimes referred to as the "post office of the cell" and it is responsible for packaging proteins into vesicles and sending them out to the correct destinations within the cell, where the proteins are used to carry out the requisite cellular functions. Mitochondria (singular—mitochondrion) are membrane-bound organelles found in the cells of most eukaryotic organisms. Mitochondria are sometimes referred to as the powerhouse of the cell, as they produce most of the energy within a cell. Mitochondria facilitate the production of ATP, the main source of chemical energy in living organisms.

Which of the following is the location in which protons and neutrons are found? A. Nucleus B. Atom C. Ion D. Molecule

Correct answer: Nucleus Protons and neutrons are located in the nucleus, which is the core of the atom and the object in which the electrons spin. An atom is the most basic complete unit of an element. An ion a positively or negatively charged atom or molecule. A molecule is a group of atoms.

A molecule's specific heat is the amount of heat needed to increase the temperature of one gram of that molecule by which of the following? A. Twenty degrees Celsius B. Ten degrees Celsius C. One degree Celsius D. Five degrees Celsius

Correct answer: One degree Celsius A molecule's specific heat is the amount of heat needed to increase the temperature of one gram of that molecule by one degree Celsius. Water's high specific heat value allows it to resist shifts in temperature and to stabilize climates.

If parents have pure breeding traits, it means which of the following? A. Both are half dominant and half recessive B. One is dominant and one is recessive C. Both are recessive D. Both are dominant

Correct answer: One is dominant and one is recessive If parents have pure breeding traits, it means that one parent is dominant and one parent is recessive. The dominant parent's genome contains two dominant alleles and the recessive parent's genome contains two recessive alleles. Pure breeding traits are not reflected in parents that are both dominant, parents that are both recessive, or parents that are half dominant and half recessive.

What might the organelles of a prokaryotic organism be compared to in a larger, more complex organism? A. Nucleoid B. Plasmids C. Organs D. Ribosomes

Correct answer: Organs Organelles are features inside prokaryotic cells that serve functions similar to those of the organs of more complex creatures. The nucleoid contains the cell's genes and genetic blueprint. Plasmids are tiny circular bits of DNA not associated with the nucleoid, and ribosomes use RNA messages to manufacture proteins for the cell.

The singer chose a melancholy song for her final song of the evening. It left the audience feeling introspective on their way home. Using context clues from the passage, what is a good synonym for the word melancholy? A. Pensive B. Intellectual C. Melodic D. Energetic

Correct answer: Pensive Melancholy means introspective, deep, thought-provoking. Synonyms are words with identical or similar meanings. Pensive is a synonym for melancholy.

View the supporting details to answer the following question. A researcher divides a cornfield into four fields and applies a different fertilizer to each field to determine the effectiveness of each fertilizer. The same brand of corn seed was used to plant all four fields and all four fields were only watered when it rained. The provided table reflects the data that was collected from the study. If the cornfield was divided in a manner that two of the fields studied were larger and received more sunlight than the other two fields, what type of bias is presented? Show Details A. Measurement bias B. Response bias C. Performance bias D. Selection bias

Correct answer: Performance bias Performance bias occurs when something effects how the treatments or interventions are delivered. Since this experiment is using two larger fields and two smaller fields with unequal sunlight, performance bias is present because the two larger fields that receive more sunlight have a greater chance of yielding more corn. Selection bias is incorrect because it occurs when the participants used for the study are not equally or randomly assigned to the control group. Measurement bias is incorrect because it occurs when the person assessing the experiment's outcomes know or is connected to the experiment's treatments. Response bias is incorrect because it occurs when only certain types of individuals respond to an invitation to participate in the experiment.

What is the process in which white blood cells eat aging red blood cells and release the contents into the blood? A. Thrombopoiesis B. Erythropoiesis C. Phagocytosis D. Hematopoiesis

Correct answer: Phagocytosis Phagocytosis is the process in which a white blood cell eats aging red blood cells and releases the contents into the blood. Erythropoiesis is the production of red blood cells. Hematopoiesis is the process of developing various blood cells from pluripotent stem cells. Thrombopoiesis is the process in which platelets are produced within bone marrow.

Which of the following options demonstrates the correct use of commas? A. Pitt, B. and Johnson, D. are two popular movie stars. B. Pitt B. and Johnson D. are two popular movie stars. C. Pitt, B., and Johnson, D., are two popular movie stars. D. Pitt, B., and Johnson, D. are two popular movie stars.

Correct answer: Pitt, B., and Johnson, D., are two popular movie stars. The sentence that demonstrates the correct use of commas is: Pitt, B., and Johnson, D., are two popular movie stars. Commas should be used to enclose initials and names that follow a surname. The other options are incorrect because the initials after the surnames are not presented properly.

Growth hormones, prolactin, adrenocorticotropic, and luteinizing hormones are all produced by which of the following endocrine system glands? A. Ovaries B. Pituitary gland C. Pineal gland D. Testes

Correct answer: Pituitary gland The endocrine system is a set of organs that secrete hormones directly into the circulatory system. Its principle functions are hormone production and internal communication and coordination. The major glands in the endocrine system are the pineal, hypothalamus, pituitary, thyroid and parathyroid, thymus, adrenal, pancreas, and ovaries or testes. These glands send hormones through the blood to other organs and tissues in the body to control the function of that organ. Growth hormones, prolactin, adrenocorticotropic, and luteinizing hormones are all produced by the pituitary gland. The pituitary gland also produces the thyroid-stimulating hormone and the follicle-stimulating hormone. The pineal gland releases melatonin. The testes produce testosterone. The ovaries produce estrogen.

If you quote a large section of text from another source, what must you do? A. Make a reference to the quotation in the footnote B. Place quotation marks around each sentence C. Cite the section within the paper D. Place quotation marks around the entire section and cite it

Correct answer: Place quotation marks around the entire section and cite it If you quote a large section of text from another source, you must place quotation marks around the entire section and cite it. This is also true when you use just a phrase or an entire sentence from another source. It is true that you must cite the section within the paper, but you must also place quotation marks around each sentence. It is true that you must place quotation marks around each sentence, but you must also cite the section within the paper. When quoting a large section of text, you must cite the other author's work, not just reference it in the footnote.

Cellulose and glycogen are examples of what type of carbohydrate? A. Disaccharide B. Polysaccharide C. Monosaccharide D. Oligosaccharide

Correct answer: Polysaccharide Cellulose and glycogen are examples of polysaccharides. Polysaccharides are formed when more than six monosaccharides are joined together. Fructooligosaccharides (FOS) and galactooligosaccharides (GOS) are examples of oligosaccharides. Sucrose and lactose are examples of disaccharides. Glucose and fructose are examples of monosaccharides.

Read the following sentence, and select the meaning of the italicized word. Insulin is endogenous and helps regulate blood sugar levels. A. Located within the body B. Produced within the body C. Produced outside the body D. Located outside the body

Correct answer: Produced within the body The term "endogenous" means produced within the body. Insulin is produced within the body and helps regulate blood sugar levels. The term "exogenous" means produced outside the body. The term "external" means located outside the body. The term "internal" means located within the body.

What kind of cell can live independently from other cells? A. Cytoplasm B. Prokaryotic C. Eukaryotic D. Organelle

Correct answer: Prokaryotic Prokaryotic cells are the most basic kind of cells that exist independently of any other cells. Bacteria are an example of this type of cell. The basic parts of these cells are the rigid outer layer known as the cell wall and an inner layer of protein fluid called cytoplasm.

The children were happy with themselves for successfully building a sandcastle. Which of the following parts of speech is "themselves" as it is used in the above sentence? A. Adverb B. Adjective C. Noun D. Pronoun

Correct answer: Pronoun The word "themselves" is used as a pronoun in the given sentence, as it is being used in the place of "children." A pronoun is a word used in place of a noun. An adjective describes or modifies a noun or a pronoun. An adverb describes or modifies a verb, an adjective, or another adverb (i.e,. successfully). A noun names a person, a place, a thing, or an idea (i.e., children).

During which mitosis phase do spindle fibers grow from centrioles? A. Metaphase B. Telophase C. Anaphase D. Prophase

Correct answer: Prophase Prophase is the mitosis phase during which spindle fibers grow from centrioles. Prophase is the first phase of mitosis, and the following actions occur during that phase: Chromosomes condense and the nuclear envelope breaks down Spindle fibers grow from centrioles Centrioles migrate to opposite poles of a cell Mitosis is a four-stage process that creates two identical cells from one original cell. Prophase is the first and longest stage of mitosis. In this stage, the chromosomes become visible and the centrioles separate and move to opposite poles of the cell. Metaphase is the second stage of mitosis. In this stage, the chromosomes line up across the center of the cell and become connected to the spindle fiber at their centromere. Anaphase is the third stage of mitosis. In this stage, the sister chromatids separate into individual chromosomes and are pulled apart. Telophase is the fourth and last stage of mitosis. During this stage, the chromosomes gather at opposite ends of the cell and lose their distinct rod-like shapes. Two new nuclear membranes then form around each of the two regions of DNA and the spindle fibers disappear.

Molecules composed of amino acids joined by peptide bonds are known as which of the following? A. Nucleic acids B. Proteins C. Carbohydrates D. Lipids

Correct answer: Proteins Proteins are molecules composed of amino acids joined by peptide bonds. Protein monomers are called amino acids. There are 20 different types of amino acids with different chemical properties based on their side groups. They all share an amino group and a carboxylic acid group. Carbohydrates are sugars and starches which the body breaks down into glucose. Carbohydrate functions include structural function, energy storage, and recognition molecules. Lipids are proteins composed predominately of hydrogen and carbon, and are often referred to as "fats." Lipids such as fats, oils, and adipose store energy efficiently. Nucleic acids are long molecules made of nucleotides; deoxyribonucleic acid (DNA) and ribonucleic acid (RNA).

Which of the following are found in the nucleus of an atom? A. Neutrons and electrons B. Protons and neutrons C. Neutrons, electrons, and protons D. Protons and electrons

Correct answer: Protons and neutrons Protons and neutrons are found in the nucleus of an atom. The nucleus is located in the center of the atom. Protons have a positive charge and neutrons are neutral. Electrons are not found in the nucleus; however, they do surround the nucleus and they are negatively charged. An atom is composed of neutrons, electrons, and protons.

The antidiuretic hormone is produced by the posterior pituitary gland. The antidiuretic hormone does which of the following? A. Produces estrogen and progesterone B. Controls calcium and phosphorous levels C. Regulates the body's water balance D. Maintains healthy blood sugar levels

Correct answer: Regulates the body's water balance The endocrine system is a set of organs that secrete hormones directly into the circulatory system. Its principle functions are hormone production and internal communication and coordination. The major glands in the endocrine system are the pineal, hypothalamus, pituitary, thyroid and parathyroid, thymus, adrenal, pancreas, and ovaries or testes. These glands send hormones through the blood to other organs and tissues in the body to control the function of that organ. The antidiuretic hormone regulates the body's water balance. The pancreas maintains healthy blood sugar levels. The parathyroid gland controls calcium and phosphorous levels. The ovaries produce estrogen and progesterone.

Water's high specific heat value allows it to do which of the following? A. Maintain a strong cohesive bond B. Float on a substance's liquid form C. Resist shifts in temperature D. Act as a versatile solvent

Correct answer: Resist shifts in temperature Water's specific heat value allows it to resist shifts in temperature. Due to the high specific heat value of water, oceans and large bodies of water help stabilize the climate. Hydrogen bonding increases water's cohesive properties and allows water, in its solid form (ice), to float on a substance's liquid form. Water's polarity allows it to act as a versatile solvent.

Selecting a topic occurs during the prewriting stage. All except which of the following are strategies used for selecting a topic? A. Freewriting B. Revising C. Clustering D. Listening

Correct answer: Revising Revising is not a strategy used for selecting a topic during the prewriting stage. Revising is the third writing stage that comes after the prewriting and drafting stages. Freewriting, clustering, listening, journal writing, dialoguing, and reflecting are all strategies one can use to select a topic during the prewriting stage.

Which of the following organelles does a unit membrane not surround? A. Nucleus B. Mitochondria C. Lysosomes D. Ribosomes

Correct answer: Ribosomes A unit membrane is a lipoprotein membrane that encloses many cells and cell organelles and is composed of two electron-dense layers enclosing a less dense layer. A unit membrane does not surround ribosomes, the centrosome, centrioles, or basal bodies. Unit membranes do surround the nucleus, mitochondria, lysosomes, peroxisomes, endoplasmic reticulum, and Golgi complex.

Cells with a high rate of protein synthesis generally have a large number of which of the following cellular structures? A. Golgi apparatus B. Mitochondrion C. Chloroplasts D. Ribosomes

Correct answer: Ribosomes Ribosomes aid in protein synthesis. Therefore, cells with a high rate of protein synthesis tend to have a large number of ribosomes. Mitochondrion is an organelle that is found in the cytoplasm of eukaryotic cells. Chloroplasts convert light energy into sugars. Golgi apparatus is where proteins are transported to and modified.

Which type of bias occurs when the target population to sample and the participants are not representative of the larger population? A. Measurement bias B. Response bias C. Sampling bias D. Selection bias

Correct answer: Sampling bias Sampling bias occurs when the target population to sample and the participants are not representative of the larger population. Selection bias is incorrect because it occurs when the participants used for the study are not equally or randomly assigned to the control group. Response bias is incorrect because it occurs when only certain types of individuals respond to an invitation to participate in the experiment. Measurement bias is incorrect because it occurs when the person assessing the experiment's outcomes know or is connected to the experiment's treatments.

The carpals in the wrist are examples of which type of bone? A. Short bone B. Long bone C. Irregular bone D. Flat bone

Correct answer: Short bone The skeletal system has three main functions: movement, protection, and metabolism. The skeletal system is composed of bone, which is an organ that is constantly being reorganized. Bones synthesize blood and immune cells, as well as store calcium, phosphate, and lipids. Bone is a dynamic tissue that is made and broken down according to need. It also functions to provide structural, protective, and metabolic needs.

I must have got some sun from working outside all day. What is the sentence construction for the above sentence? A. Complex B. Compound-complex C. Simple D. Compound

Correct answer: Simple The given sentence is a simple sentence, as it contains only one independent clause and no dependent clause. This particular simple sentence contains an independent clause ("I must have got some sun") with two phrases ("from working outside" and "all day"). A compound sentence contains two independent clauses joined by a comma and a coordinating conjunction or by a semicolon. A complex sentence contains one independent clause and one or more dependent clauses. A compound-complex sentence contains two or more independent clauses and one or more dependent clauses.

Which phase of matter has definite shape and volume? A. Gas B. Solid C. Liquid D. Plasma

Correct answer: Solid The solid phase of matter has definite shape and volume. When molecules are in solid form they have vibrational motion and are grouped in a compact, arranged pattern. The liquid phase of matter does not have definite shape but does have definite volume. The gas phase of matter does not have definite shape or volume. The plasma phase of matter is similar to the gas phase only its electrons are free to move around the system.

At the triple point, which phases of matter coexist? A. Solid and gas B. Solid, liquid, and gas C. Solid and liquid D. Liquid and gas

Correct answer: Solid, liquid, and gas At the triple point is where the solid, liquid, and gas phases of matter coexist. The triple point is the point on a phase diagram in which the three states of matter coexist. The other options are incorrect because the solid, liquid, and gaseous phases all coexist at the triple point.

Which of the following is an unpaired skull bone that helps to make up part of the orbit of the eye and houses the pituitary gland? A. Occipital bone B. Sphenoid bone C. Frontal bone D. Ethmoid bone

Correct answer: Sphenoid bone

If a liquid has a pH of 2, is it an acid or a base? A. Weak base B. Weak acid C. Strong acid D. Strong base

Correct answer: Strong acid pH is the measure of acidity or alkalinity. Acid: substance with a pH less than 7 Base (alkaline): substance with a pH greater than 7 Neutral: substance with a pH of 7

Potassium chloride salt is formed when a potassium solution combines with chloride. This is an example of which of the following? A. Combustion B. Double replacement C. Single replacement D. Synthesis

Correct answer: Synthesis An example of synthesis is when a potassium solution is combined with chloride to form potassium chloride salt. Synthesis is a reaction that causes two elements to join to form one product. Single replacement occurs when an active metal reacts with an ionic compound that contains a less active metal to form a new compound. Combustion is an exothermic chemical reaction that occurs when heat acts on oxygen or a fuel compound. Double replacement occurs when two ionic compounds combine and form two new ionic compounds that have switched partners.

Which of the following best describes the sublimation curve? A. The boundary between solid and gas for any given substance as plotted on a phase diagram B. None of these C. The boundary between liquid and gas for any given substance as plotted on a phase diagram D. The boundary between solid and liquid for any given substance as plotted on a phase diagram

Correct answer: The boundary between solid and gas for any given substance as plotted on a phase diagram A sublimation curve is the boundary between solid and gas for any given substance as plotted on a phase diagram. A fusion curve is the boundary between solid and liquid for any given substance as plotted on a phase diagram. A vaporization curve is the boundary between liquid and gas for any given substance as plotted on a phase diagram.

Which sentence contains a subject-verb agreement error? A. Chips and dip are party essentials. B. The scissors were found in the junk drawer. C. The child is proud of her artwork. D. The cause of his issue were the punctured tires.

Correct answer: The cause of his issue were the punctured tires. The subject-verb agreement error is found in the following sentence: The cause of his issue were the punctured tires. The subject of the verb "were" is "cause." Since "cause" is singular, it needs a singular verb, not a plural verb. The sentence should be written: "The cause of his issue was the punctured tires." The subject-verb agreement in the other three sentences is correct.

Choose the sentence that is correctly punctuated. A. The dinner that Karen cooked was very delicious; however, the kitchen looks like a tornado hit it. B. The dinner that Karen cooked was very delicious, however the kitchen looks like a tornado hit it. C. The dinner that Karen cooked was very delicious: however, the kitchen looks like a tornado hit it. D. The dinner that Karen cooked was very delicious, however; the kitchen looks like a tornado hit it.

Correct answer: The dinner that Karen cooked was very delicious; however, the kitchen looks like a tornado hit it. The given sentence uses a conjunctive adverb to separate two independent clauses. That adverb must be preceded by a semicolon and followed by a comma in order to avoid causing a run-on sentence.

Which sentence has correct subject-verb agreement? A. The passing cars was the cause of his issue. B. The issue he was experiencing was with the passing cars. C. The jeans is too tight on me. D. Measles are still considered a serious disease.

Correct answer: The issue he was experiencing was with the passing cars. The sentence that has correct subject-verb agreement is: "The issue he was experiencing was with the passing cars." When a noun comes before (issue) and after (cars) the verb, the verb (was) must agree with the subject (issue), not with the complement (cars). Since "issue" is singular, the verb (was) must also be singular. The other three sentence options do not have correct subject-verb agreement and should be written as follows: "The passing cars were the cause of his issue"; "The jeans are too tight on me"; and "Measles is still considered a serious disease." The noun "measles" is plural in form but singular in meaning and requires a singular verb. The noun "jeans" is plural in form but singular in meaning and requires a plural verb.

In regard to pH values, which of the following statements is true? A. The lower the pH value, the more hydrogen ions a solution has and the more acidic it is B. The lower the pH value, the fewer hydrogen ions a solution has and the less acidic it is C. The lower the pH value, the more hydrogen ions a solution has and the less acidic it is D. The lower the pH value, the fewer hydrogen ions a solution has and the more acidic it is

Correct answer: The lower the pH value, the more hydrogen ions a solution has and the more acidic it is pH is the measure of acidity or alkalinity. Acid: substance with a pH less than 7 Base (alkaline): substance with a pH greater than 7 Neutral: substance with a pH of 7

The atomic masses that are presented in decimal form on the periodic table are used to represent which of the following? A. The natural profusion of the element's assorted protons B. The natural profusion of the element's assorted electrons C. The natural profusion of the element's assorted neutrons D. The natural profusion of the element's assorted isotopes

Correct answer: The natural profusion of the element's assorted isotopes The atomic masses that are presented in decimal form on the periodic table are used to represent the natural profusion of the element's assorted isotopes. Isotopes are the atoms of elements that contain different numbers of neutrons. The other choices are incorrect as the atomic mass number that appears on the periodic table represents the element's assorted isotopes, not neutrons, electrons, or protons.

Which of the following sentences is an example of a metaphor? A. The tire squealed on the hot pavement. B. The trees whistled in the wind. C. The nurse is a vampire. D. The father is like a tree.

Correct answer: The nurse is a vampire. An example of a metaphor is: "The nurse is a vampire." A metaphor is a comparison between unlike objects without using the words "like" or "as". A metaphor is a figurative device. "The father is like a tree" is an example of a simile. "The trees whistled in the wind" and "The tire squealed on the hot pavement" are examples of personification.

In regard to a surface area chemical reaction, which of the following is false? A. The reaction will be faster as the surface area is increased B. Smaller particles have a larger surface area and react faster C. The reaction will be faster as the surface area is decreased D. Larger particles have a smaller surface area and react slower

Correct answer: The reaction will be faster as the surface area is decreased In regard to a surface area chemical reaction, it is false to say that the reaction will be faster as the surface area is decreased because the reaction will be faster as the surface area is increased. It is true that the reaction will be faster as the surface area is increased, that smaller particles have a larger surface area and react faster, and that larger particles have a smaller surface area and react slower.

Which of the following sentences is not an example of subject-verb agreement? A. Nicole's shoe collection was getting out of control. B. The students was driving the teacher crazy by yelling out answers. C. Behavior in children is most often determined by parental behavior. D. Five boys were teasing a group of girls on the playground during recess.

Correct answer: The students was driving the teacher crazy by yelling out answers. Subject-verb agreement is matching like numbers of subjects and verbs: singular with singular, plural with plural. "The students was driving the teacher crazy by yelling out answers." In this sentence, the words students and was are not in agreement. Students is a plural word, while was is correctly used with a singular subject. The sentence should read "The students were driving the teacher crazy by yelling out answers." The remaining answer choices are examples of proper subject-verb agreement.

In regard to DNA and RNA, which of the following statements is false? A. RNA is much smaller than DNA B. RNA has only one nucleotide chain C. DNA is a double helix D. The sugar in RNA is deoxyribose

Correct answer: The sugar in RNA is deoxyribose The sugar in RNA is ribose, not deoxyribose. The sugar in DNA is deoxyribose. The other answer options are all true facts in regard to RNA and DNA.

Which of the following is not true of neutrons? A. They can move freely B. They are located in the nucleus C. They are neutrally charged D. Their mass is similar to that of protons

Correct answer: They can move freely A neutron is a neutral particle of the cell located within the nucleus. It is here that the neutron is confined, which makes it difficult to move freely about. Protons and neutrons are comparable in mass, although some scientists argue that the neutron has slightly more mass than the proton.

Which of the following is true in regard to liquid molecules? A. They move rapidly and are spread far apart B. They have vibrational motion and are grouped in a compact, arranged pattern C. They exhibit translational and vibrational order D. They are packed tightly together and have no motion

Correct answer: They exhibit translational and vibrational order Liquid molecules exhibit translational and vibrational order. When matter is in a liquid phase it does not have a definite shape, but it does have volume. Gas molecules move rapidly and are spread far apart. Solid molecules have vibrational motion and are grouped in a compact, arranged pattern. When molecules are above -273°C, they are always in motion; therefore, the option that states they have no motion is not typically true of liquid molecules.

When revising your writing, you should move text in your writing for which of the following reasons? A. To expand an interesting idea B. To remove non-supporting ideas C. To share more details D. To make a dramatic impact

Correct answer: To make a dramatic impact When revising your writing, you should move text in your writing to make a dramatic impact, to create a clear flow of ideas, and to present points in order. You should add to your writing to share more details or to expand an interesting idea. You should delete material from your writing to remove non-supporting ideas.

What is the primary function of ribosomes in the cell? A. To transport materials throughout the cell B. To produce energy for the cell C. To contain the cell DNA D. To read RNA in the nucleus and translate the genetic instructions to produce proteins

Correct answer: To read RNA in the nucleus and translate the genetic instructions to produce proteins The ribosomes help with the creation of proteins by translating the nucleus RNA into instructions for creating proteins.

Parentheses are used in all except which of the following instances? A. To place a full sentence within another sentence B. To set off an explanation that interrupts a sentence C. To add an explanatory sentence after a sentence D. To set off a quoted passage

Correct answer: To set off a quoted passage Quotation marks, not parentheses, are used to set off a quoted passage. Parentheses are used to place a full sentence within another sentence, to set off an explanation that interrupts a sentence, and to add an explanatory sentence after a sentence.

Which of the following best describes the function of DNA? A. To assemble the RNA B. To synthesize RNA and protein C. To assemble proteins D. To carry out the instructions in RNA

Correct answer: To synthesize RNA and protein The option that best describes the function of DNA is to synthesize RNA and protein. RNA's functions are to carry out the instructions in DNA and to assemble proteins. RNA polymerase is an enzyme that assembles the RNA after it binds to DNA.

The nervous system is composed of nervous tissue, which has two classes of cells known as neurons and neuroglia. There are three classes of neurons; one of which is known as afferent neurons. What do afferent neurons do? A. Transmit signals from the central nervous system to effectors B. Receive signals from the central nervous system to effectors C. Transmit sensory signals from receptors to the central nervous system D. Receive sensory signals from receptors to the central nervous system

Correct answer: Transmit sensory signals from receptors to the central nervous system Afferent (sensory) neurons transmit sensory signals from receptors to the central nervous system. Afferent neurons are also known as sensory neurons. Efferent (motor) neurons broadcast nerve impulses away from the central nervous system and to the effector organs. Interneurons receive information from the afferent neurons and directs the information through the use of the efferent neurons.

During the Krebs cycle of cellular respiration, glucose molecules are consumed. For every single consumed glucose molecule, what is produced? A. Six ATP molecules, six carbon dioxide molecules, and six NADH molecules B. Six carbon dioxide molecules and six NADH molecules C. Two ATP molecules and six carbon dioxide molecules D. Two ATP molecules, six carbon dioxide molecules, and six NADH molecules

Correct answer: Two ATP molecules, six carbon dioxide molecules, and six NADH molecules For every single glucose molecule consumed during the Krebs cycle, two ATP molecules, six carbon dioxide molecules, and six NADH molecules are produced. The Krebs cycle occurs in the matrix of the mitochondria.

During the glycolysis process of cellular respiration, what is produced? A. Two ATP molecules, two pyruvate molecules, and two NADH molecules B. Six ATP molecules, six carbon dioxide molecules, and six NADH molecules C. Two ATP molecules, two carbon dioxide molecules, and two NADH molecules D. Six ATP molecules, six pyruvate molecules, and six NADH molecules

Correct answer: Two ATP molecules, two pyruvate molecules, and two NADH molecules During the glycolysis process of cellular respiration, two ATP molecules, two pyruvate molecules, and two NADH molecules are produced. The glycolysis process takes place in the cytosol of the cell.

A water molecule contains two types of atoms that are covalently bonded. Which of the following makes up a water molecule? A. One hydrogen atom and one oxygen atom B. One hydrogen atom and two oxygen atoms C. Two hydrogen atoms and two oxygen atoms D. Two hydrogen atoms and one oxygen atom

Correct answer: Two hydrogen atoms and one oxygen atom Two hydrogen atoms and one oxygen atom are covalently bonded to make a water molecule (H2O).

Clorice always smells wine before she tastes it. Which of the following parts of speech is "smells" as it is used in the above sentence? A. Adverb B. Adjective C. Pronoun D. Verb

Correct answer: Verb The word "smells" is used as a verb in the given sentence, as it expresses action. A verb is a word that expresses action. A pronoun is a word used in place of a noun (i.e., she). An adjective describes or modifies a noun or a pronoun. An adverb describes or modifies a verb, an adjective, or another adverb (i.e., always).

Which tool would most likely be used to measure length? A. Beaker B. Graduated cylinder C. Vernier caliper D. Triple beam balance

Correct answer: Vernier caliper A Vernier caliper is an instrument used to measure length. Other instruments used to measure length are rulers and gauges. A triple beam balance is an instrument used to measure mass. A beaker and a graduated cylinder are instruments used to measure volume.

When does the mitosis stage known as anaphase begin? A. When chromosomes align in the center of the cell B. When duplicated chromosomes have noticeable sister chromatids C. When the nuclear envelope begins to disappear D. When chromosomes start to separate

Correct answer: When chromosomes start to separate The mitosis stage known as anaphase begins when chromosomes start to separate. The chromatids are considered separate chromosomes during the anaphase stage. Mitosis is a four-stage process that creates two identical cells from one original cell. Prophase is the first and longest stage of mitosis. In this stage, the chromosomes become visible and the centrioles separate and move to opposite poles of the cell. Metaphase is the second stage of mitosis. In this stage, the chromosomes line up across the center of the cell and become connected to the spindle fiber at their centromere. Anaphase is the third stage of mitosis. In this stage, the sister chromatids separate into individual chromosomes and are pulled apart. Telophase is the fourth and last stage of mitosis. During this stage, the chromosomes gather at opposite ends of the cell and lose their distinct rod-like shapes. Two new nuclear membranes then form around each of the two regions of DNA and the spindle fibers disappear.

When is a single covalent bond formed? A. When two neutrons bond within an atom B. When two electrons bond within an atom C. When one pair of electrons is shared between two atoms D. When one pair of neutrons is shared between two atoms

Correct answer: When one pair of electrons is shared between two atoms A single covalent bond is formed when one pair of electrons is shared between two atoms. A general covalent bond is formed when two atoms share their electrons. Covalent bonds are the strongest type of chemical bond. When two electrons bond within an atom is incorrect because two atoms need to share a pair of electrons in order for a single covalent bond to form. When one pair of neutrons is shared and when two neutrons bond are incorrect because covalent bonds are formed when electrons are shared.

When is it appropriate to use a question mark at the end of a sentence? A. When indicating a pause B. When requesting something C. When showing uncertainty D. When expressing a strong feeling

Correct answer: When showing uncertainty It is appropriate to use a question mark at the end of a sentence when showing uncertainty. An exclamation point should be used at the end of a sentence when expressing a strong feeling. A period should be used at the end of a sentence when requesting something. An ellipsis should be used at the end of a sentence when indicating a pause.

When is a triple covalent bond formed? A. When three neutrons bond within an atom B. When three electrons bond within an atom C. When three neutron pairs are shared between two atoms D. When three electron pairs are shared between two atoms

Correct answer: When three electron pairs are shared between two atoms A triple covalent bond is formed when three electron pairs are shared between two atoms. A general covalent bond is formed when two atoms share their electrons. Covalent bonds are the strongest type of chemical bond. When three electrons bond within an atom is incorrect because two atoms need to share three electron pairs in order for a triple covalent bond to form. When three neutron pairs are shared and when three neutrons bond are incorrect because covalent bonds are formed when electrons are shared.

Choose the sentence that is correctly punctuated. A. Whenever I see her at a restaurant she inevitably is eating a grilled chicken salad. B. Whenever I see her, at a restaurant, she inevitably is eating a grilled chicken salad. C. Whenever I see her at a restaurant; she inevitably is eating a grilled chicken salad. D. Whenever I see her at a restaurant, she inevitably is eating a grilled chicken salad.

Correct answer: Whenever I see her at a restaurant, she inevitably is eating a grilled chicken salad. The use of a comma is required between a dependent clause ("Whenever I see her at a restaurant") and an independent clause ("she inevitably is eating a grilled chicken salad") when the dependent clause precedes the independent clause. A semicolon is not necessary; it would be used between two independent clauses.

Wine is made from various varieties of grapes. Red wine is made from red grapes and is fermented with the grape skins in order to achieve the rich red colors. Which statement provides the most plausible extension to the above observation? A. Wine is used to make a popular summer beverage known as sangria. B. White wine is made from white or green grapes and is fermented using only the juice from the grapes. C. Various types of chocolate can be paired with wine to bring out the flavor of both, the chocolate and the wine. D. Red wine is said to be healthier than white wine, as the tannins in red wine have health benefits.

Correct answer: White wine is made from white or green grapes and is fermented using only the juice from the grapes. The statement that provides the most plausible extension to the given observation is: "White wine is made from white or green grapes and is fermented using only the juice from the grapes." The observation states that wine is made from various types of grapes and then it explains how red wine is fermented; therefore, the most plausible extension is to explain how white wine is fermented. The initial observation said nothing about the consumption of wine; therefore, it would not be plausible to extend the observation with how wine is used to make sangria, how red wine is healthier to drink than white wine, or that wine can be paired with chocolate.

A research paper is considered your own when which of the following occurs? A. You copy-and-paste another writer's work as your own B. You are interested in the topic, you learn about the topic, and your voice is the primary voice in the paper C. You use one source to write your paper and use the proper quotation marks and citations D. You paraphrase or use borrowed material with your own i

Correct answer: You are interested in the topic, you learn about the topic, and your voice is the primary voice in the paper A research paper is considered your ow

Which option identifies a single replacement chemical reaction? A. HCl + NaOH → NaCl + HOH B. 2Fe + O2 → 2FeO C. Zn + 2HCl → H2 + ZnCl2 D. 2KClO3 → 2KCl + 3O2

Correct answer: Zn + 2HCl → H2 + ZnCl2 Zn + 2HCl → H2 + ZnCl2 identifies a single replacement chemical reaction, as it contains a single free element that replaces or is substituted for one of the elements in a compound. 2KClO3 → 2KCl + 3O2 identifies a decomposition chemical reaction, as it contains a single reactant that is broken down into two. 2Fe + O2 → 2FeO identifies a synthesis chemical reaction, as it contains two reactants that are uniting to form a single product. HCl + NaOH → NaCl + HOH identifies a double replacement chemical reaction, as it exchanges compound element partners.

Jane realized the kittens were running away from dogs. Which option represents the given sentence's prepositional phrase? A. Jane realized B. away from dogs C. the kittens were running D. were running away

Correct answer: away from dogs The given sentence's prepositional phrase is: "away from dogs." This phrase functions as an adverb and modifies the word "running." A prepositional phrase includes the preposition (away from), the object of the preposition (dogs), and the modifiers of the object. The other options are not considered prepositional phrases, as they do not begin with prepositions.

Identify the adjectives in the following sentence. After she was bitten, Mary never again touched the big white dog. A. big; dog B. Mary; dog C. after; bitten D. big; white

Correct answer: big; white After she was bitten, Mary never again touched the big white dog. An adjective is a word or phrase naming an attribute, added to or grammatically related to a noun to modify or describe it. Both big and white are adjectives that act as modifiers for the noun dog. In this sentence, after is a preposition, bitten is a verb, Mary is a noun, and dog is a noun.

I wanted to scream when I saw the snake, _______ I was too terrified. Which transition word best completes the above sentence? A. suddenly B. but C. consequently D. also

Correct answer: but The transition word that best completes the sentence is "but." I wanted to scream when I saw the snake, but I was too terrified. The transition word "but" is used to show opposition, which is the best choice since the author wanted to do something and then didn't because of another reason. Transition words or phrases help tie ideas together. The transition word "suddenly" is best used in a sentence that requires chronologic order. The transition word "also" is best used in a sentence showing agreement. The transition word "consequently" is best used in a sentence demonstrating the effect of something.

The clown showed the crowd his best tricks. What is the indirect object of the above sentence? A. showed B. tricks C. clown D. crowd

Correct answer: crowd The given sentence's indirect object is "crowd." An indirect object names the person to whom or for whom something is being done. The word "tricks" is the sentence's direct object, as it is receiving the action of the verb (showed) directly from the subject (clown). The word "clown" is the sentence's subject, as it is the sentence's principal noun that is doing. The word "showed" is the sentence's action verb

"Given the patient's symptoms, I would say she ______ has a serious infection." Which of the following choices contains proper spelling to correctly complete the sentence above? A. definately B. definitively C. definitely D. defiantly

Correct answer: definitely Definitely is both the correct word and the correct spelling. Though each answer is similar to the proper spelling, each is flawed. "Given the patient's symptoms, I would say she definitely has a serious infection." Defiantly is an adjective used to describe doing something in a defiant manner. This choice does not fit the context of the sentence. Definitively is an adjective meaning most reliable or complete. This choice does not fit the context of the sentence. Definately is an incorrect spelling of the word and is not a word at all.

The golf club was excited about achieving both of their goals. The adjective "both" modifies which of the following words in the given sentence? A. club B. goals C. their D. excited

Correct answer: goals The adjective "both" modifies the noun "goals" in the given sentence. A modifier helps describe another word. An adjective is a word that modifies a noun or pronoun; therefore, the adjective "both" would need to modify a noun or pronoun. In this case, the adjective "both" is describing the golf club's "goals." The adjective "both" does not modify the words: club, excited, or their.

In a redox reaction, the element that is oxidized _______ an electron and the element that is reduced _______ an electron. A. gains, gains B. gains, loses C. loses, gains D. loses, loses

Correct answer: loses, gains In a redox reaction, the element that is oxidized loses an electron and the element that is reduced gains an electron. Oxidation equals loss and reduction equals gain.

Which prefix should be added to a word function to indicate hate? A. mal- B. circ- C. miso- D. deca-

Correct answer: miso- The prefix miso- is added to a word function to indicate hate. For example, misogyny means hatred of women, and misogamy means hatred of marriage. The prefix mal- is added to a word function to indicate poorly or badly. The prefix deca- is added to a word function to indicate ten. The prefix circ- is added to a word function to indicate around.

Choose the correct word to fill in the blank. All of the features added to the new model of the automobile seemed totally ______ and did not add anything of import or practicality to the car. A. pretentious B. prescient C. superfluous D. ostentatious

Correct answer: superfluous All of the features added to the new model of the automobile seemed totally superfluous and did not add anything of import or practicality to the car. To figure out what the missing word is, try to predict its definition by using keywords from the prompt. The keywords here are "did not add anything of import or practicality," and the missing word must have a similar meaning, as the conjunction "and" suggests that both are descriptive of the car's new features. Thus, the missing word must mean unnecessary. Since superfluous means unnecessary, this is the correct answer. Pretentious means pompous. Prescient means having knowledge of things before they occur. Ostentatious means designed to impress or attract notice.

Find the value of t: t/5 + 1/4 = 3/10 - 2t/5 A. t = 3/100 B. t = 1/4 C. t = 1/12 D. t = 3/20

Correct answer: t = 1/12 t/5 + 1/4 = 3/10 - 2t/5 The common denominator in this equation is 20, so convert all fractions. (t/5 × 4/4) + (1/4 × 5/5) = (3/10 × 2/2) - (2t/5 × 4/4) 4t/20 + 5/20 = 6/20 - 8t/20 Rearrange to group common terms. 4t/20 + 8t/20 = 6/20 - 5/20 Solve the equation 4t/20 + 8t/20 = 6/20 - 5/20 12t/20 = 1/20 12t = 1 t = 1/12

I found the lost stuffed animal under the bed. Which of the following words from the above sentence is a preposition? A. under B. lost C. found D. bed

Correct answer: under The word "under" is a preposition. A preposition appears first in a prepositional phrase and shows the relationship between its object and another word in the sentence. The word "found" is a verb. The word "lost" is used as an adjective. The word "bed" is a noun.

What is the fluid between the nucleus and the surface membrane known as? A. Nuclear envelope B. Cytoplasm C. Golgi vesicle D. Mitochondria

Cytoplasm

Find the value of x by solving the following proportion. 9:72 :: x:128 A. 8 B. 16 C. 32 D. 56

Explanation Correct answer: 16 1. Rewrite the proportion as a fraction 9/72 = x/128 2. Simplify 9/72 to 18 18 = x/128 3. Multiply both sides by 128 16 = x 4. Switch sides x = 16

Write the following expression in words: 2x² - 3 = x + 12 A. Three less than twice the square of a number is twelve more than the number B. Twice the square of a number is twelve more than the number C. Three less than twice a number is twelve more than the number D. Twice the square of a number less than three is twelve more than the number

Explanation Correct answer: 3 less than twice the square of a number is twelve more than the number Start with the left side of the equation. x² can be written as 'the square of a number.' 2x² can be written as 'twice the square of a number.' 2x² - 3 can be written as 'three less than twice the square of a number.' Next, write out the right side of the equation. x + 12 is written as 'twelve more than a number. Therefore, the entire equation can be written as 'Three less than twice the square of a number is twelve more than the number.'

Which of the following is defined by a cluster of capillaries around the end of a kidney tubule, where waste products are filtered from the blood? A. Medulla B. Nephron C. Glomerulus D. Cortex

Glomerulus

Which type of bond is formed when a hydrogen atom is attracted to a highly electronegative element? A. Chemical bond B. Hydrogen bond C. Covalent bond D. Ionic bond

Hydrogen bond A hydrogen bond is formed when a hydrogen atom is attracted to a highly electronegative element. Hydrogen bonding is an intermolecular force. An ionic bond is formed when two oppositely charged ions are electrostatically attracted. A covalent bond is formed when two atoms share one electron from each atom. A chemical bond is formed when one atom, chemical, or element is joined to another.

During which phase of mitosis do the chromosomes align on the spindle fibers? A. Metaphase B. Telophase C. Anaphase D. Prophase

Metaphase Mitosis is a four-stage process that creates two identical cells from one original cell. Prophase is the first and longest stage of mitosis. In this stage, the chromosomes become visible and the centrioles separate and move to opposite poles of the cell. Metaphase is the second stage of mitosis. In this stage, the chromosomes line up across the center of the cell and become connected to the spindle fiber at their centromere. Anaphase is the third stage of mitosis. In this stage, the sister chromatids separate into individual chromosomes and are pulled apart. Telophase is the fourth and last stage of mitosis. During this stage, the chromosomes gather at opposite ends of the cell and lose their distinct rod-like shapes. Two new nuclear membranes then form around each of the two regions of DNA and the spindle fibers disappear.

Which of the following words is spelled correctly? A. Perceeve B. Perceve C. Perceive D. Percieve

Perceive

What does 2L + 2W = P. solve for?

Perimeter of a triangle

"Jacob waited in his car for work to begin." What function does the word in serve in this sentence? What is the verb? What is the subject? What is the object?

Preposition Waited Jacob Work

Which of the following are large biological molecules consisting of one or more chains of amino acids? A. Genes B. Protons C. Proteins D. Chromosomes

Proteins Proteins are large biological molecules consisting of one or more chains of amino acids.

The atomic number for the element carbon (C) is 6. If the element has a positive charge of 2, how many electrons does the element have? A. 8 B. 4 C. 3 D. 13

Since the atomic number for carbon is 6 and it has a positive charge of 2, it would have 4 electrons. When an element has a positive charge, the charge is subtracted from the atomic number. 6 - 2+ = 4e When carbon has a positive charge of 2, it contains 4 electrons, not 3, 8, or 13.

The organ of Corti is located within the inner ear, and it contains hair cells that are located inside of it. What do the hair cells inside of the organ of Corti do? A. Equalize air pressure B. Transfer sound vibrations C. Secrete wax D. Detect sound

The hair cells inside of the organ of Corti detect sound. The organ of Corti is spiral shaped and is the main hearing organ located within the cochlear duct. The three tiny bones of the middle ear transfer sound vibrations. The Eustachian tube of the middle ear equalizes air pressure. The ear canal of the outer ear contains glands that secrete wax.

the product in math means

x

An independent variable is

the object that is being measured as a possible cause