chem
You conduct an experiment to see how salt concentration affects catecholase enzyme activity. You conduct the experiment with 0%, 5%, 15%, and 30% salt, and measure the reaction rate at each concentration by recording the absorbance of light using a spectrophotometer. Refer to the data table below when answering the following questions. Data for absorbance at different salt concentrations.Salt ConcentrationAbsorbance0%1.05%0.815%0.530%0.1 At which salt concentration is enzyme activity at an optimal (highest) level?
0%
Match the names of the numbered microscope parts.
1 ocular lens (eyepiece) Correct!2 revolving nosepiece Correct!3 objective lens Correct!4 coarse focus knob Correct!5 fine focus knob Correct!6 stage Correct!7 light Correct!8 condenser Correct!9 stage clips
Match the following description with the correct biome:
1) Temperate Decidious Forest: This biome has four seasons. The temperature varies widely from season to season with cold winters and hot, wet summers. During the winter the plants go dormant and many of the animals hibernate or migrate. 2) Tropical Rainforest: Hot and rainy all year long (humid). It contains the greatest biodiversity out of all the biomes. The dense canopy forms many layers and the plants compete for light 3) Chapparal: Characterized by hot, dry summers and mild, rainy winters. This ecosystem as a whole is adapted to recover from periodic wildfires. Animals are usually nocturnal. 4) Savanna: Warm year-round with dry and wet seasons. Periodic fires are common during the dry season and the vegetation includes drought-tolerant and fire-tolerant plants. 5) Tundra: Winters are long, dark, and cold, with average temperatures below 0°C for six to 10 months of the year. The temperatures are so cold that there is a layer of permanently frozen ground below the surface, called permafrost. 6) Temperate Grassland: Contains a rich mix of grasses and herbaceous plants and contain some of the world's most fertile soils. The vegetation is well-adapted to drought, fire, and cold. 7) Coniferous Forest: Winters are long and cold and the summer growing season is short. Vegetation includes evergreen trees with needle-like leaves. 8) Desert: Characterized by very little rainfall and large temperature fluctuations between day and night. Most of the animals are nocturnal and live underground.
If the total magnification of the object being viewed is 100X, what is the magnification of the objective lens that is being used?
10x
A package of peanut butter crackers contains 7g of fat, 16g of carbohydrates and 4g of protein. What are the % Calories for protein?
11.2%
Given the following conversion factors, identify the correct answer below.1 kilogram = 1000 gram1 gram = 1000 milligram 2 kilograms = ________ milligrams
2,000,000
Use the conversion factor provided to calculate the correct answer.1 inch = 2.54 centimeters 9 inches = _______ centimeters
22.86
Use the conversion factor provided to calculate the correct answer.1 meter = 1.094 yards 3.5 yards = _______ meters
3.2
Use the conversion factor provided to calculate the correct answer.1 liter = 1000 milliliter 30 liter = ______ milliliter
30,000
If you conduct an experiment in which you measure the affect of temperature on the activity of amylase that you extract from you own saliva, which temperature would you expect to have the highest level of amylase activity?
37 degrees celsius
Which of the following objective lenses would show the smallest field of view?
40x
Use the conversion factor provided to calculate the correct answer.oF = (oC x 1.8) + 32 20oC = ________ oF
68
Given the following conversion factors, identify the correct answers for A and B below.1 meter = 100 centimeters1 meter = 1,000,000 micrometer 2 meters = __A__ centimeters 5000 micrometers = __B__ meters
A = 200; B = 0.005
Identify the body symmetry AND whether tissues are present or absent for the following phyla: (you may use the phylogenetic tree on pg. 166 to quickly identify the body symmetry and the presence or absence of tissues for each phylum). Porifera: body symmetry = [ 1 ] , tissues are [ 2 ] Cnidaria: body symmetry = [ 3 ] , tissues are [ 4 ] Platyhelminthes: body symmetry = [ 5 ] , tissues are [ 6 ] Mollusca: body symmetry = [ 7 ] , tissues are [ 8 ] Annelida: body symmetry = [ 9 ] , tissues are [ 10 ] Nematoda: body symmetry = [ 11 ] , tissues are [ 12 ] Arthropoda: body symmetry = [ 13 ] , tissues are present Echinodermata: body symmetry = [ 14 ] as a larva and [ 15 ] as an adult, tissues are [ 16 ] Chordata: body symmetry = [ 17 ] , tissues are [ 18 ]
Answer 1:Asymmetrical Answer 2:absent Answer 3:Radial Answer 4:present Answer 5:Bilateral Answer 6:present Answer 7:Bilateral Answer 8:present Answer 9:Bilateral Answer 10:present Answer 11:Bilateral Answer 12:present Answer 13:Bilateral Answer 14:present Answer 15:Bilateral Answer 16:Penta-radial Answer 17:present Answer 18:Bilateral Answer 19:present
The enzyme [ Select ] ["quinone", "catechol", "maltose", "amylase", "starch"] is produced by many mammals (including humans) and converts the substrate starch into the product [ Select ] ["catechol", "maltose", "quinone", "catecholase"]
Answer 1:Correct!amylase Answer 2:Correct!starch Answer 3:Correct!maltose
The enzyme catalase is produced by many organisms and converts the substrate hydrogen peroxide into the products oxygen and water .
Answer 1:Correct!catalase Answer 2:Correct!hydrogen peroxide Answer 3:Correct!oxygen and water
Match the phylum name with the distinguishing characteristics.
Arthropoda Exoskeleton, body divided into segments (head, thorax, abdomen) Correct!Porifera Aquatic, sessile, body has pores and channels to filter feed, no tissues Correct!Chordata Dorsal nerve cord, notochord, pharyngeal slits Correct!Echinodermata Pentaradial symmetry, water vascular system Correct!Annelida Segmented, worm-like body, complete digestive system Correct!Cnidaria Radial symmetry, two tissue layers, stinging cells Correct!Platyhelminthes Flat, worm-like body, digestive tract with single opening Correct!Mollusca Mantle, muscular foot, visceral mass, hard external shell in most members Correct!Nematoda Round, worm-like body, no segmentation, tapered at both ends
You conduct an experiment to see how the color of light affects photosynthesis in spinach.What kind of graph would be most appropriate for displaying the results and why? Data table showing % floating disks under different colors of light.Color of light% Floating disksWhite100%Red70%Blue80%Green10%
Bar graph because the independent variable is categorical data
When baking bread, what product of fermentation causes the dough to rise?
CO2
The wells that contain the DNA samples are placed next to the negatively charged electrode in the electrophoresis box (chamber) because _______.
DNA is negatively charged
Which of the following characteristics do monocot Angiosperms exhibit? Select ALL that apply.
Flower parts in multiples of 3 Correct! Leaf veins that are parallel
Match the following terms with their definitions:
Gametophyte: haploid stage of the plant life cycle Sporophyte: diploid stage of the plant life cycle Xylem: vascular tissue that transports water and nutrients Phloem: vascular tissue that transports sugars Cone: reproductive structure of gymnosperms Flower: reproductive structure of angiosperms
Which of the graphs below has the most accurate best fit line?
Graph A, the dots are almost perfectly aligned with the straight line
Identify the purpose of each of the following steps in the photosynthesis experiment.
Hole-punching the leaves standardize the surface area of the leaves Adding bicarbonate buffer to the syringe. provide a source of water and carbon dioxide Exposing the disks to a vacuum in the syringe. remove oxygen from the leaves to make them sink Adding a plain buffer to the syringe. provide a source of water only (no carbon dioxide)
For the fermentation experiment where you observed the effect of different sugars on the fermentation rate in yeast, identify each of the following.
IV: different sugars DV: CO2 production Control: water Standardized: amount of sugar used
Consider the following question:Does eating a sweet snack (e.g. candy) cause more weight gain than eating an oily snack (e.g. potato chips)?Identify the following elements of this snack experiment.
IV: type of snack, DV: weight gain, control: group of participants who did not eat a snack, experimental: a group who DID eat a snack, standardized: amount of daily exercise
Refer to the background information about peanuts on pg. 14 of your lab manual to answer this question.Identify the following elements of this peanut experiment.
IV:soil PH DV: plant growth Control: Soil with neutral PH Experimental: acidic and basic soil Standardized: Variety of peanut plant
You conduct an experiment to see how the color of light affects photosynthesis in spinach.Identify the following variables. Data table showing % floating disks under different colors of light.Color of light% Floating disksWhite100%Red70%Blue80%Green10%
Independent variable color of light Correct!Dependent variable % floating disks
Match each phrase with the correct answer.
Organism in a lichen that provides nutrients through photosynthesis algae Correct!Branched growth form of lichen fruticose Correct!Leafy growth form of lichen foliose Correct!Small and flat growth form of crustose
Consider the following question:Does eating a sweet snack (e.g. candy) cause more weight gain than eating an oily snack (e.g. potato chips)? Select a scientifically testable hypothesis that would be appropriate for this question.
Participants who snack on candy gain more weight than those who snack on chips.
The following question is based on the anole lizard video "The Origin of Species: Lizards in an Evolutionary Tree." What does the evidence suggest regarding the evolution of body types of anole lizards on the different islands?
The same body types of lizards evolved independently on each island.
The following question is based on the rock pocket mouse video "Making of the Fittest: Natural Selection and Adaptation". In what way were the mice living on dark lava rock in different regions DIFFERENT from each other?
They had different mutations
Nutrition Facts for plain yogurt.PLAIN YOGURTNutrition Facts4 servings per containerServing Size1 cup (227g)Amount per Serving% Daily ValueTotal Fat9g14%Saturated Fat5g25%Trans Fat0gCholesterol30mg10%Sodium115mg5%Total Carbohydrates12g4%Dietary Fiber0g0%Total Sugars12gIncludes 0g Added SugarsProtein8g16% Match the correct values for Calories and % Calories for carbohydrate, protein, and fat.
Total Calories from carbohydrate 48 Correct!Total Calories from protein 32 Correct!Total Calories from fat 81 Correct!% Calories from carbohydrate 30 Correct!% Calories from protein 20 Correct!% Calories from fat 50
Provide a biological reason for why yeast cannot use certain sugars for fermentation.
Yeast lack the necessary enzymes for that sugar.
You are attempting to see if a suspect is associated with a crime. The only evidence you have is a tiny drop of blood from the crime scene, which is not enough to run an analysis. How can you increase the number of copies of your crime scene DNA sample?
You can use polymerase chain reaction (PCR) to increase the amount of DNA.
Which of the following groups have either some or all members that are autotrophic? Select ALL that apply.
bacteria, plant, protist
The enzyme [ Select ] ["quinone", "maltose", "starch", "catecholase", "catechol"] is produced by fruits and vegatables (such as potatoes) and converts the substrate [ Select ] ["amylase", "starch", "catechol", "catetcholase", "quinone", "maltose"] into the product
catecholase, catechol, quinone
Which of the following organelles/structures are found only in plant cells and NOT in animal cells? Select ALL that apply. mitochondria
central vacuole, chloroplast, cell wall
You conduct an experiment to see how the color of light affects photosynthesis in spinach.Provide one biological explanation for why % floating disks is low under green light. Data table showing % floating disks under different colors of light.Color of light% Floating disksWhite100%Red70%Blue80%Green10%
chlorophyll cannot absorb green light
Identify which kind of specimen is best viewed under each type of microscope.
compound (light) microscope small, thin specimen Correct!dissecting microscope larger, thicker specimen
STR analysis is a DNA profiling technique that makes use of the fact that different people have
different numbers of repeats of short DNA sequences at certain sites in the genome.
Which of the following animals routinely rely on echolocation to navigate and find food? Select ALL that apply.
dolphins, bats
According to the data table below, which part of the body has the highest concentration of touch receptors? Data table for the concentration of touch receptors.Location on BodyThe average number of taps detected (out of 20)Face20Neck17Shoulder12Back of Arm14Fingertip19
face
Consider the following question:Does eating a sweet snack (e.g. candy) cause more weight gain than eating an oily snack (e.g. potato chips)?For this experiment, you will collect qualitative data.
false
For the hand cleanser experiment, the unwashed thumb was an experimental treatment.
false
if you observe fuzzy colonies on your exposure plate, they are most likely bacterial colonies.
false
true or False The majority of animals have backbones.
false
Which of the following types of plants require water for reproduction? Select ALL that apply.
ferns, bryophytes
According to the data table below, which part of the body has touch receptors with the smallest receptive fields, thus making them more sensitive to touch? Data table for two-point discrimination.Location on BodyMin. distance at which two points are detected (mm)Face7Neck8Shoulder10Back of Arm12Fingertip5
fingertip
Which of the following traits are unique to angiosperms and absent in the other plant groups? Select ALL that apply.
fruit, flower
Which of the following types of plants contain seeds? Select ALL that apply.
gymnosperms, angiosperms
What benefit does the Hawaiian Bobtail squid get from the Vibrio fischeri bacteria?
he bacteria provide the squid with camouflage.
Which of the following people would have identical DNA fingerprints? Select ALL that are correct.
identical twins
You conduct an experiment to see how salt concentration affects catecholase enzyme activity. You conduct the experiment with 0%, 5%, 15%, and 30% salt, and measure the reaction rate at each concentration by recording the absorbance of light using a spectrophotometer. Refer to the data table below when answering the following questions. Data for absorbance at different salt concentrations.Salt ConcentrationAbsorbance0%1.05%0.815%0.530%0.1 Identify the following variables.
independent variable salt concentration Correct!dependent variable absorbance
The following question is based on the natural selection experiment that you conducted online (corresponding to pp. 190-192 in your lab manual). Identify the following elements of the predation experiment that you conducted on the Desert Sand background.
independent variable the color of the prey Correct!dependent variable % survivors Correct!standardized variable the type of predator
Which of these individuals is more "fit" from an evolutionary perspective?
individual C lives for 5 years and has 4 surviving offspring
What is special about Vibrio fischeri bacteria? Select ALL that apply.
it is bioluminescent
Gel electrophoresis separates DNA fragments on the basis of differences in their ______.
length
When using the compound microscope, which objective lens should you use first to locate the specimen?
low (scanning)
If you placed an Elodea plant in a solution of cresol that was yellow due to the presence of carbon dioxide in water, and you placed this setup in the dark, would you expect the solution to turn red over time? Why or why not?
no, because the plant cannot photosynthesize in the dark.
Which of the following is an example of quantitative data? Select ALL that apply.
number of peanuts harvested total biomass of the plant height of the peanut plant
The percentage of floating leaf disks is a reasonable measure of photosynthetic rate because the leaves float due to ________ production.
oxygen
You conduct an experiment to see how pH affects catecholase enzyme activity. You conduct the experiment at a pH of 3, 5, 7, 9, and 11, and measure the reaction rate at each pH by recording the absorbance of light using a spectrophotometer. Refer to the data table below when answering the following questions. Data for absorbance at different pH.pHAbsorbance30.250.471.290.7110.0 At which pH is the enzyme most likely to be denatured? How do you know?
pH 11 because absorbance is lowest
Refer to the background information about peanuts on pg. 14 of your lab manual to answer this question.Which of the following would be an appropriate, scientifically testable hypothesis for this experiment?
peanuts grow better in neutral soil
Which of the following traits do gymnosperms and angiosperms BOTH have (and other plant groups lack), that helped them survive and reproduce in drier climates? Select ALL that apply.
pollen, seed
Which of the following structures are modified stems that store nutrients allow propagation? Select ALL that apply.
potato tuber
Which of the following are characteristics that are used to classify and divide the animal phyla? Select ALL that apply.
presence or absence of tissues, body symmetry
Which of the following organisms are composed of eukaryotic cells? Select ALL that apply.
protist, plant, animal
Which of the following animals routinely rely on electroreception to navigate and find food? Select ALL that apply.
rays, sharks
Which of the following senses would be LEAST useful for gathering information or communicating in the dark?
sight
Which of the following are examples of quantitative data? Select ALL that apply.
temperature, absorbance, volume of oxygen gas
Lichens can often survive in very harsh environments that most other organisms cannot tolerate. What characteristics of lichens allow them to survive in such environments? Select ALL that apply.
the algae provide a source of food. he fungi provide water and mineralss.
Which of the following is a"fruit" according to the botanical definition? Select ALL that apply.
tomato, bell pepper, cucumber
ALL bacteria use Quorum Sensing to communicate.
true
In the surfaces exposure plate experiment, the quadrant that had been swabbed with the bottom of the shoe contained a greater diversity of microbial growth compared to the backpack.
true
The fungal agar plate had a greater diversity of colonies than the bacterial agar plate.
true
True or False Humans have bilateral symmetry.
true
You conduct an experiment to see how the color of light affects photosynthesis in spinach.According to these data, which light is best for promoting photosynthesis in spinach? Data table showing % floating disks under different colors of light.Color of light% Floating disksWhite100%Red70%Blue80%Green10%
white
You conduct an experiment to see how temperature affects catecholase enzyme activity. You conduct the experiment at 0oC, 20oC, 37oC, and 100oC, and measure the reaction rate at each concentration by recording the absorbance of light using a spectrophotometer. Refer to the data table below when answering the following questions. Data for absorbance at different temperatures.Temp (oC)Absorbance00.25200.55370.721000.01 Identify which variable you would plot on each axis when graphing the results of this experiment.
x-axis temperature Correct!y-axis absorbance
Which of the following are accessory pigments found in spinach that are not directly involved in photosynthesis? Select ALL that apply.
xanthophyll, carotene
