TEAS SCIENCE SECTION ATI

when calculating population growth, which equation is appropriate Emigrants - immigrants) + (births - deaths) (Immigrants - emigrants) + (births - deaths) (Births + deaths) - (emigrants + immigrants) (Births - deaths) - (immigrants + emigrants)

(Immigrants - emigrants) + (births - deaths)

which is the value of the prefix milli 10 -6 1000 10 -3 0.1

10 -3

which describes the concentration of H+ ions in water with a pH of 7 10 7M 7M .7M 10 -7M

10 -7M

An atom of lithium, has 3 protons, 4 neutrons, and 3 electrons. What is the atom's mass number? 3 6 10 7

7

a patient who has a mutation that causes type 1 diabetes is trying a therap that uses their own stem cells to restore their insulin production. before their stem cells can be used, which should be done The stem cells should be inactivated with UV radiation. A normal gene should be supplied in place of the defective one before therapy. The patient should be advised that the genetically altered cells will be passed on to offspring. The patient should be tested to ensure that their body will not reject the stem cells.

A normal gene should be supplied in place of the defective one before therapy.

In humans, A and B alleles are codominant over O to determine blood type. Which of the following combinations of parental genotypes has the greatest probability of producing a child with type AB blood? AB AND BO AO AND BO AB AND AB AA AND BB

AA AND BB

which of the following correctly describes the color change and substance properties of acid-base indicator testing Blue litmus turns red, indicating the presence of a base with a pH > 7. Red litmus turns blue, showing the presence of an acid with a pH > 7. Blue litmus turns red, indicating the presence of an acid with a pH < 7. Red litmus turns blue, showing the presence of a base with a pH < 7.

Blue litmus turns red, indicating the presence of an acid with a pH < 7.

what happens in the circulatory system during hyperventilation Oxygen levels increase, causing an increase in blood pH. Carbon dioxide levels decrease, causing an increase in blood pH. Oxygen levels decrease, causing a decrease in blood pH. Carbon dioxide levels increase, causing a decrease in blood pH.

Carbon dioxide levels decrease, causing an increase in blood pH.

which component of a phospholipid gives it nonpolar characteristics Glycerol molecule Hydrogen bonds Phosphate group Carbon-hydrogen chains

Carbon-hydrogen chains

which of the following outcomes will most likely result from an increase in a population level of education and standard of living and an improvement in educational and employment opportunities for women? Increase in the population's average female fertility Increase in the population's death rate Decrease in the population's life expectancy Decrease in the population's birth rate

Decrease in the population's birth rate

which of the following results from the release of dopamine into the nerve synapse The presynaptic neuron fires an action potential. Dopamine binds to receptor proteins on the membrane of the postsynaptic cell. Dopamine enters the cytoplasm of the postsynaptic cell. Dopamine causes the postsynaptic nerve cell to contract.

Dopamine binds to receptor proteins on the membrane of the postsynaptic cell.

which of the following methods could be used to determine how much volume is taken up by rocks placed in a container Mass the container; mass the container with the rocks in it; calculate the difference in these two masses. Count the number of rocks; mass the rocks; then divide the mass of the rocks by the number of rocks. Fill the container to capacity with water; add rocks to the container; collect the water that overflows and mass it. Mass the container empty; fill it with the rocks and water; then mass it again and find the difference.

Fill the container to capacity with water; add rocks to the container; collect the water that overflows and mass it.

which might help a species to escape extinction in the face of changing environmental conditions Extreme specialization Small populations Narrow ecological niches Generalized distribution

Generalized distribution

which statement correctly describes the relationship between genes and chromosomes Genes are DNA sequences found on chromosomes. chromosomes contain genes composed of amino acids. Chromosomes are DNA sequences found on genes. Genes contain chromosomes composed of amino acids.

Genes are DNA sequences found on chromosomes.

which of these substances will best dissolve in water CH4 CCL4 HCL N2

HCl

which of the following actions are controlled by the autonomic nervous system Heart rate increases while running. Hand is withdrawn quickly after touching a hot surface. Stomach muscles contract to aid digestion. Salivary glands release secretions in response to the presence of food. Blood vessels constrict to reduce the flow of blood to the skin.

Heart rate increases while running. Stomach muscles contract to aid digestion. Salivary glands release secretions in response to the presence of food. Blood vessels constrict to reduce the flow of blood to the skin.

which of the following is an example of a nonspecific action of the immune system Plasma cells produce antibodies to attack foreign cells. Memory T-cells are produced in response to vaccines. Inflammation is initiated in response to infection. Cytotoxic T-cells are activated to attack infected cells.

Inflammation is initiated in response to infection.

which of the following is the function of the spleen in a health human It stores bile produced in the liver. It synthesizes platelets. It is a vestigial organ. It degrades aged red blood cells.

It degrades aged red blood cells.

which of the following is a function of a somatic reflex It helps to produce an involuntary response in the absence of a stimulus. It helps to produce a response quickly to protect the body from harm. It helps to produce variable responses to the same sensory input. It helps the individual to produce an appropriate voluntary response.

It helps to produce a response quickly to protect the body from harm.

a chlorine atom has 17 electrons and 17 protons. it forms an ionic bond with sodium and gains a neg charge. which is true for Cl ion It is an anion with 18 electrons and 17 protons. It is an anion with 18 electrons and 18 protons. It is a cation with 18 electrons and 18 protons. It is a cation with 17 electrons and 18 protons.

It is an anion with 18 electrons and 17 protons.

which of the following is true of centromeres of mitotic chromosomes prior to anaphase It is the region where sister chromatids are most closely attached. It is the region where crossing over occurs. It is the region where replication begins. It is the region where histones are made.

It is the region where sister chromatids are most closely attached.

which of the following is a characteristic feature of the adaptive immune system It uses phagocytes for the ingestion of foreign particles. It produces antibodies against a specific antigen in the body. It exerts the first response of the immune system against an infection. It is comprised of non-specific barriers against a pathogen.

It produces antibodies against a specific antigen in the body.

which of the following compounds is an ionic compound PCl3 H2O MgF2 NH3

MgF2

which of the combinations of the parents' genotypes has the highest probability of producing a child with blood type O Both parents are heterozygous and have blood type AB. One parent is heterozygous for blood type A and the other is heterozygous for blood type B. One parent is homozygous for blood type A and the other is homozygous for blood type O. One parent has blood type AB and the other is homozygous for blood type O.

One parent is heterozygous for blood type A and the other is heterozygous for blood type B.

whochof the following statements is correct regarding the organisms in which photosynthesis and oxidative respiration occur Photosynthesis occurs only in plants, whereas oxidative respiration occurs in all life forms. Photosynthesis occurs in many prokaryotes and some eukaryotes, whereas oxidative respiration occurs only in aerobic eukaryotes. Photosynthesis occurs only in plants, whereas oxidative respiration occurs only in animals Photosynthesis occurs in many prokaryotes and eukaryotes, whereas oxidative respiration occurs only in aerobic prokaryotes and eukaryotes.

Photosynthesis occurs in many prokaryotes and eukaryotes, whereas oxidative respiration occurs only in aerobic prokaryotes and eukaryotes.

which property of water explains its characterization as the universal solvent Kinetic energy of liquid water molecules High specific heat Polarity of water molecules High surface tension

Polarity of water molecules

which of the following describes the role of regulatory genes Regulatory genes control the expression of structural genes. Regulatory genes catalyze chemical reactions. Regulatory genes transfer information stored in DNA into proteins. Regulatory genes code for membrane proteins.

Regulatory genes control the expression of structural genes.

which of the following statements best explains why RNA inside a cell is almost never single stranded Alleles for genes are found in pairs, so their RNAs also pair up. RNA normally exists with its complementary strand in a double helix. RNA and DNA form hybrid pairs for all transcribing parts of the chromosome. Short stretches of complementary sequences can cause RNA to fold back on itself.

Short stretches of complementary sequences can cause RNA to fold back on itself.

which is the correct order of events in a signaling pathway in feedback loop Receptor → Effector → Integration → Stimulus → Response Receptor → Stimulus → Integration → Response → Effector Stimulus → Effector → Integration → Receptor → Response Stimulus → Receptor → Integration → Effector → Response

Stimulus → Receptor → Integration → Effector → Response

which of the following correctly describes physical changes between states of matter Deposition occurs when the water in a lake changes to ice. Evaporation occurs when candle wax burns to form smoke. Condensation occurs when glue solidifies with exposure to air. Sublimation occurs when dry ice turns into carbon dioxide gas.

Sublimation occurs when dry ice turns into carbon dioxide gas.

which describes systemic circulation Supplies oxygen-poor blood from the right ventricle to the lungs Receives oxygen-rich blood from the lungs to the right atrium Supplies oxygen-rich blood from the left ventricle to the body Receives oxygen-poor blood from the body to the left atrium

Supplies oxygen-rich blood from the left ventricle to the body

which causes acid reflux The cardiac sphincter does not close tightly. Peristalsis occurs slowly in the esophagus. Excess gastric juices are produced by the stomach. The pH value for gastric juices is increased.

The cardiac sphincter does not close tightly.

which is true of enzyme-catalyzed reactions The enzyme is not consumed in the reaction. The substrate is produced in the active site. The substrate remains unchanged during the reaction. The enzyme raises the activation energy of the reaction.

The enzyme is not consumed in the reaction.

which of the following statements are true regarding th lymphatic system? It is a closed circulatory system. The lymph flows from the interstitial spaces toward the heart. The lymph transports carbon dioxide to the lungs for expiration. The lymphatic systems helps the body to absorb lipids. The lymphatic system contains more red blood cells than white blood cells.

The lymph flows from the interstitial spaces toward the heart The lymphatic system helps the body to absorb lipids is correct

a student placed 20ml NaOH solution in a beaker and added 5mL of HCl. what would happen when they're mixed Hydrogen gas is released. Carbon dioxide gas is produced. The pH of the resultant solution is reduced. The concentration of OH- ions is increased.

The pH of the resultant solution is reduced.

which of the following is the role of the urethra to transport urine out of the body to transport the egg to the uterus To connect the kidneys to the bladder To connect the uterus to the outside of the body

To transport urine out of the body

which if the following occurs when a skeletal muscle is in a relaxed state Tropomyosin covers myosin-binding sites. Myosin forms cross bridges with actin filaments. Ca2+ is released into the cytosol of the muscle cell. ATP binds to myosin heads.

Tropomyosin covers myosin-binding sites.

which of the following describes the function of the ribosome in a cell Production of ATP molecules from energy in nutrient molecules Disposal and recycling of damaged or unneeded cell parts Use of genetic information to build specific protein molecules Regulation of molecules entering and leaving the cell

Use of genetic information to build specific protein molecules

a blood pressure reading of 120/70mm refers to arterial pressures recorded during which of the following events Atrial contraction/ventricular contraction Atrial contraction/ventricular relaxation Ventricular contraction/ventricular relaxation Ventricular relaxation/atrial relaxation

Ventricular contraction/ventricular relaxation

which of the following is a chemical property of water Ice is less dense than, and floats on, liquid water. Water can be decomposed into hydrogen and oxygen gas. Water has a high surface tension due to hydrogen bonding. Bonds between water molecules can be broken by heating.

Water can be decomposed into hydrogen and oxygen gas.

a field containing a single variety of commercial bananas is devastated by a virus. nearby, wild banana groves with similar plant densities show infection but many plants remain healthy. which of these statements best explain this observation Crowded fields lead to higher plant stress and greater susceptibility to infection. Density-dependent shading in the commercial fields leads to rapid spread of viruses in damp soil. Wild bananas have more genetic variation, and some plants are resistant to the banana virus. Commercial bananas are genetically modified and less robust than wild bananas.

Wild bananas have more genetic variation, and some plants are resistant to the banana virus.

which hormone is released in response to a drop in BP Melatonin Somatostatin Oxytocin Aldosterone

aldosterone

which of the following terms describes the bonding together of smaller molecules to form larger molecules anabolism catalysis catabolism anaphylaxis

anabolism

which of the following molecules present in blood has the ability to buffer changes in pH Cholesterol Bicarbonate Plasma sugars Circulating salts

bicarbonate

which of the following temperature scales is zero degrees equal to the freezing point of water kelvin Fahrenheit celsius newton

celsius

which of the following diseases is primary caused by a toxin produced by a microorganism cholera leprosy acne HIV

cholera

which is a type of specialized enticed-processing cell that activates t-cells of the immune system plasma thrombocytes dendritic cells eosinophils

dendritic cells

which of the following is an example of an intensive property mass density volume length

density

which is the main function of bile juices Breaking down proteins Emulsifying fats Detoxifying poisons Digesting carbohydrates

emulsifying fats

which of the following hormones is produced in the ovaries Estrogen Vasopressin Prolactin Oxytocin

estrogen

which connects ovaries to the uterus Vas deferens Ureters Fallopian tubes Urethra

fallopian tibes

which of the following is an example of a long bone vertebra sacrum rubs femur

femur

the process known as gastrulation results in the formation of which of the following embryonic structures germ layers circulatory system neural crest limb buds

germ layers

after doing a belly flop into a swimming pool, a child says, " the water slapped me." what is the property of water that causes the slap irregular expansion hydrogen bonding capillary action hydrophobic exclusion

hydrogen bonding

which cell types confer waterproofing on outer layers of skin Melanocytes Keratinocytes Merkel cells Langerhans cells

keratinocytes

which of the following cells rid the body of dust and other particles that enter the lungs alveoli macrophages sertoli cells erythrocytes

macrophages

which bones is the large dusted bone of the upper jaw that contains teeth mandible maxilla vomer clavicle

maxilla

vitamin b12 is converted into methyl-cobalamin which is consumed in a reaction where methionine synthase produces the amino acid methionine. which is the catalyst in the reaction Vitamin B12 Methyl-cobalamin Methionine synthase Methionine

methionine synthase

which of the following cell organelles are abundant in nerve and muscle cells to help meet their atp requirements ER mitochondria golgi bodies nucleus

mitochondria

An infant's immune system is immature at the time of birth. They receive their birthing parent's antibodies through the placenta before birth and from breast milk after birth. Which of the following terms can be used to describe this type of immunity? active immunity adaptive immunity innate immunity passive immunity

passive immunity

which of the following chemical bonds is found within ammonia (NH3) Nonpolar covalent bonds Polar covalent bonds Ionic bonds Hydrogen bonds

polar covalent bonds

which of the following will likely happen in the case of blocked and injured ureters request urination no urine formation reduced flow of urine to the bladder Bladder stretches due to an increase in urine volume

reduced flow of urine to the bladder

which of the following is improved when repeated trials of an esxperiment have consistent results reliability validity independent variables dependent variables

reliability

which of the following is the gland on a hair follicle that supplies the hair shaft and skin with oil eccrine gland apocrine gland sebaceous gland ceruminous gland

sebaceous gland

where is vitamin b12 absorbed Stomach Pancreas Large intestine Small intestine

small intestine

which is the circular muscle that regulates the opening and closing of a body aperture Fossa Fascia Sphincter Valve

sphincter

which of the following classes of chemical messengers is able to easily diffuse across the cell membrane steroids interleukins catecholamines histamines

steroids

which of the following is the collagen-rich material that connects muscle to bone tendon ligament reticular tissue areolar tissue

tendon

which of the following statements describes an ion of the isotope aluminum 27 the ion has 13 neutrons the atom has a mass of 14 the atom has 27 electrons the ion has an electric charge of +3

the ion has an electric charge of +3

which of the following will occur in the absence of melanocytes in the skin The skin will have a thin dermis. The skin will not have pigmentation. The skin will get tanned on exposure to sunlight. The skin will not be able to maintain its temperature.

the skin will not have pigmentation

which of the following hormones requires iodine for its production thyroid hormone melatonin parathyroid hormone calcitonin

thyroid hormone

A gene is being copied into a molecule that contains ribose and uracil. Which of the following cellular processes does this describe? dna replication translation gene splicing transcription

transcription

which plane divides the body into inferior and superior portions sagittal median frontal transverse

transverse

which term means the intake and expulsion of air in lungs inspiration aeration ventilation oxygenation

ventilation

a student wants to design an experiment to demonstrate the effects of acid rain. which of the following substances should be combined with water to stimulate acid rain Vinegar Table salt Baking soda Ammonia

vinegar

which pathogen would be unaffected by treatment with an antibiotic that inhibits ribosome function Viruses Bacteria Protists Fungi

viruses