Biology Exam on Chapter 23 and 29 - Friday March 10, 2017

The rate of a chemical reaction at 20°C os 2 and at 30°C is 4. The Q10 for this reaction is a. 0.0 b. 0.5 c. 1.0 d. 2.0 e. 8.0

D. 2.0

Which of the following Q10 values indicates that a reaction is not temperature sensitive a. 1 b. 2 c. 3 d. 8 e. 10

a. 1

Suppose that the rate of a particular biological function at 15C is X. If the Q10 of that function at 25C is _____ the rate is _____ a. 1; X b. 1; 25 c. 2; X d. 3; 2X e. 3; 30

a. 1; X

characteristics only found in animals include a. a nervous sytem b. multicellularity c. heterotrophic metabolism d. both a and b e. both b and c

a. a nervous system

Which of the following parts of the pituitary makes its own hormones? a. anterior pituitary b. posterior pituitary c. hypothalamus d. portal blood vessels e. adrenal glands

a. anterior pituitary

Rising levels of a released hormone endocrine secretion may inhibit its further release from the cells that secreted it. This is an example of a. autocrine function in a negative feedback system b. autocrine function in a positive feedback system c. paracrine function in a negative feedback system d. exocrine function in a negative feedback system e. endocrine function in a positive feedback system

a. autocrine function in a negative feedback system

there appears to be a strong evolutionary link between a. colonial choanoflagellate protists and sponges b. sponges and cnidaria c. ciliated protists and cnidarians d. colonial choanoflagellate protists and cnidarians e. none of the above

a. colonial choanoflagellate protists and sponges

as a member of the protostome group of animals a. has a mouth derived from the blastopore b. has an anus derived from the blastopore c. does not have ectoderm d. is diploblastic e. has spiral cleavage of the egg

a. has a mouth derived from the blastopore

because all animals must take in nutrients from their environment and digest their food internally, the nutritional mode of animals is called a. holotropic b. photoheterotrophs c. photoautotrophs d. chemolithotrophs e. chemoautotrophs

a. holotropic

Which of the following statements about positive feedback is false? a. it is more commonly observed in living organisms than negative feedback b. it tends to reach a limit and terminate rapidly c. it amplifies a response d. contractions of the uterus are an example of positive feedback e. sexual behavior is an example of positive feedback

a. it is more commonly observed in living organisms than negative feedback

Which statement about brown fat is true? a. it produces heat without producing much atp b. it insulates animals acclimate to cold c. it is a major source of heat production in birds d. it is found only in hibernators e. it provides fuel for muscle cells

a. it produces heat without producing much atp

The mechanisms of homeostasis a. keep the internal physiological environment relatively constant regardless of external changes b. keep vital organs working at their maximum potential c. keep all cells working at the same metabolic rate d. keep the body's metabolic rate constant in varying environmental temperatures e. keep the body's temperature constant in varying environmental temperatures

a. keep the internal physiological environment relatively constant regardless of external changes

Online news sites sometimes feature stories of dogs adopting kittens, or female cats adopting squirrels. This maladaptive behavior is likely caused by the secretion of a. oxytocin b. testosterone c. parathyroid hormone d. ADH e. luteinizing hormone

a. oxytocin

Which of the following hormones is not paired correctly with one of its target organs? a. oxytocin - adrenal glands b. gonadotropin releasing hormone - anterior pituitary c. FSH - gonads d. ADH - kidneys e. luteinizing hormone - gonads

a. oxytocin - adrenal glands

Which of the following hormones stimulates the release of calcium from bone into the bloodstream? a. parathyroid hormone b. thyroxine c. calcitonin d. oxytocin e. vasopressin

a. parathyroid hormone

Today's reptiles are poikilotherms. A lizard in a temperate desert environment where the temperature is cold at night and warm during the day. In order for the lizard to maintain the most stable body temperature, it could, a. stay in a burrow during the night and shuttle between the sun and shade in the surface during the day b. stay on the surface during the night and move to a burrow during the day c. increase its metabolism and heat production during the night and increase it during the day d. decrease its metabolism and heat production during the night and increase it during the day e. move into a state of hypothermia during the night and a state of torpor during the day

a. stay in a burrow during the night and shuttle between the sun and shade in the surface during the day

Which of the following phylum consists of animals that are radially symmetric as adults but bilaterally symmetrical in their juvenile forms a. the echinodermata b. the platyhelminthes c. the cnidaria d. the porifera e. the nematoda

a. the echinodermata

Which of the following share the most recent common ancestor with the phylum Chordata? a. the echinodermata b. the platyhelminthes c. the cnidaria d. the porifera e. the nematoda

a. the echinodermata

Negative feedback occurs when temperatures of the mammalian hypothalamus rises above or drops below set points, The result is will be that a. thermoregulatory responses are activated to reverse the direction of the temperature change b. thermoregulatory responses are activated to reverse the direction of temperature change c. new set points are generated d. body temperature destabilizes e. metabolic rate destabilizes

a. thermoregulatory responses are activated to reverse the direction of the temperature change

Which of the following is a type of hormone that acts primarily on cells close to the source of the hormone? a. a tropic hormone secreted by the anterior pituitary b. a paracrine c. follicle-stimulating hormone d. oxytocin e. antidiuretic hormone

b. a paracrine

a radial body form with radial symmetry is most likely to be found in a. a chordate that is a prey animal b. a predator that drifts through the ocean c. an animal that burrows through soil d. both a and b e. both b and c

b. a predator that drifts through the ocean

A chemical reaction has a Q10 of 3. Which of the following rates characterizes this reaction? a. a rate of 6 at 20°C and 2 at 30°C b. a rate of 6 at 30°C and 2 at 20°C c. a rate of 9 at 20°C and 3 at 30°C d. a rate of 9 at 40°C and 3 at 20°C e. a rate of 12 at 10°C and 4 at 20°C

b. a rate of 6 at 30°C and 2 at 20°C

In addition to producing thyroxine, the mammalian thyroid gland produces a. epinephrine and norepinephrine which stimulates immediate fight or flight reactions b. calcitonin which stimulates absorption of calcium from the blood into the bone c. vasopressin which stimulates reabsorption of water from kidney tubules back into the bloodstream d. prolactin which stimulates milk production in female mammals e. thyrotropin which stimulates production of thyroid hormones

b. calcitonin which stimulates absorption of calcium from the blood into the bone

All of the following statements relating to endocrine signaling are correct except a. hormones are released to the extracellular fluid and then diffuses into the bloodstream b. hormones differ from nerve signals in that they are addresses and produced almost instantaneous responses whereas nerve signals are broadcast and therefore slower c. most tropic hormones are secreted by the anterior pituitary d. hormones, paracrines, and autocrines bind to receptors e. some endocrine cells exit as single cells within a tissue

b. hormones differ from nerve signals in that they are addresses and produced almost instantaneous responses whereas nerve signals are broadcast and therefore slower

All hormones released by the posterior pituitary are produced in the a. anterior pituitary b. hypothalamus c. pineal gland d. thymus e. thyroid

b. hypothalamus

Hormones released into the blood by the posterior pituitary are actually produced in the a. anterior pituitary b. hypothalamus c. pineal gland d. thymus e. thyroid

b. hypothalamus

As the environmental temperature in a closed, empty chamber increases (from 15°C up to 25°C) the metabolic rate of an ectotherm such as a lizard ______, and that of an endotherm such as a mouse _________. a. increases, increases b. increases, decreases c. decreases, increases d. decreases, decreases e. stays the same, decreases

b. increases, increases

bilateral symmetry a. is common in cnidarians b. is correlated with cephalization c. is a characteristic of animals that move randomly in multiple directions d. means that two halves of an organism are identical e. both b and c

b. is correlated with cephalization

Hormones produced by the adrenal cortex are a. water soluble b. lipid soluble c. steroids d. peptides e. tropic hormones

b. lipid soluble c. steroids

which two characteristics are found only in members of the animal kingdom? a. heterotrophic metabolism and motility b. muscle tissue and a nervous system c. multicellularity and motility d. internal digestion and heterotrophic metabolism e. nervous system and herterotrophy

b. muscle tissue and a nervous system

The testes release testosterone and the rising levels inhibit its further release. This is an example of a. feedbackward information b. negative feeback c. feedforward information d. positive feedback e. changing the set point

b. negative feedback

What is the difference between negative feedback mechanisms and positive feedback mechanisms? a. negative feedback mechanisms exist only in the circulatory system b. negative feedback mechanisms return a system to a set point whereas positive feedback mechanisms amplify response c. negative feedback mechanisms move a system away from a set point whereas positive feedback mechanisms stabilize a system to a set point d. negative feedback mechanisms stabilize a system towards a set point whereas positive feedback mechanisms reset the set point e. there is essentially no difference between the two feedback systems

b. negative feedback mechanisms return a system to a set point whereas positive feedback mechanisms amplify response

If a person had a tumor that caused over-secretion of the posterior hormones which of the following hormones would you expect to see at elevated levels a. glucagon b. oxytocin c. follicle stimulating hormone d. thyroid stimulating hormone e. insulin

b. oxytocin

cnidaria have the type of symmetry known as ____ symmetry a. asymmetry b. radial c. spherical d. bilateral e. axial

b. radial symmetry

The Q10 which describes the sensitivity of a reaction to temperature is calculated as the a. rate of a process at a certain temperature divided by its rate at 10C b. rate of a process at a certain temperature, divided by its rate at a temperature 10C lower c. rate of a process at a certain temperature divided by its rate at a temperature 10C higher d. temperature at which the rate of certain process doubles e. temperature at which the rate of a certain process becomes insignificant

b. rate of a process at a certain temperature, divided by its rate at a temperature 10C lower

Positive feedback a. is more common than negative feedback in physiological systems b. returns a system to a set point c. produces positive outcomes, while negative feedback produces negative results d. increases deviation from a set point e. none of the above

b. returns a system to a set point

which of the following are not eumetazoans? a. deuterostomes b. sponges c. cnidarians d. coelomates e. protostomes

b. sponges

In regulatory systems, negative feedback a. is the least common type of feedback mechanism b. stimulates a return toward the set point c. amplifies a response d. disrupts homeostasis e. none of the above

b. stimulated a return toward the set point

Q10 describes the a. pH sensitivity of a reaction or process b. temperature sensitivity of a physiological reaction or process c. rate of a chemical reaction at 0°C d. rate if a chemical reaction at 100°C e. additive increase in chemical reaction rates

b. temperature sensitivity of a physiological reaction or process

The neurohormones antidiuretic hormone (also known as ADH and vasopressin) and oxytocin are produced by the a. anterior pituitary and released by the posterior pituitary b. the hypothalamus and released by the posterior pituitary c. pituitary and act as signals to the hypothalamus d. hypothalamus and signal the brain e. pituitary and act as signals to the reproductive organs

b. the hypothalamus and released by the posterior pituitary

Which statement about autocrines is true? a. they influence the same cell that secretes them b. they influence nearby cells c. they influence distant cells d. they enter the bloodstream e. they influence nerve cells

b. they influence nearby cells

Which statement about steroid hormones is false? a. they pass easily through cell membranes b. they readily mix with blood plasma (which is 92% water) and are transported in blood without carrier molecules c. they are lipid soluble d. receptors are typically inside cells e. they are synthesized from cholesterol

b. they readily mix with blood plasma (which is 92% water) and are transported in blood without carrier molecules

If the Q10 of a metabolic process is 1.0, this means that a. Rt=rt-10 and the process is temperature sensitive. the animal is probably a homeotherm b.Rt=rt-10 and the process is not temperature sensitive. the animal is probably a ectotherm c. Rt=rt-10 and the process is not temperature sensitive. the animal is probably a homeotherm d. Rt=rt-10 and the process is temperature sensitive. the animal is probably a poikilotherm e. Rt=rt-10 and the process is temperature sensitive. the animal is probably a poikilotherm

c. Rt=rt-10 and the process is not temperature sensitive. the animal is probably a homeotherm

Which of the following statements about endocrine secretions, endocrine cells, and target cells is false? a. target cells have receptors for binding the endocrine secretions they are a target for b. some endocrine cells exist as single cells within a tissue c. all endocrine cells exist as single cells within a tissue d. endocrine glands lack ducts that lead to the outside of the body e. some endocrine cells produce secretions that diffuse directly through the intercellular fluid to act on adjacent cells

c. all endocrine cells exist as single cells within a tissue

The sex hormone (such as estrogen and testosterone) are secreted by the gonads (and to a small extent by the adrenal cortex), and are synthesized from a. complex carbohydrates b. amino acids c. cholesterol d. hemoglobin e. nucleic acids

c. cholesterol

if an animal has identifiable anterior and posterior ends, and distinct dorsal and ventral regions, then it must also a. be a chordate b. have left and right sides c. be grouped among the eumetazoa d. have bilateral symmetry e. all except choice a are correct

e. all except choice a are correct

the probable ancestor of the animal clade is probably resembled modern a. marine worms, which have similarities to modern multicellular sponges b. colonial choanoflagellates, which have similarities to modern colonial cnidarians c. colonial choanoflagellates, which have similarities to modern multicellular choanoflagellates d. colonial cnidarians, which have similarities to modern colonial choanoflagellates e. multicellular sponges, which have similarities to modern colonial cnidarians

c. colonial choanoflagellates, which have similarities to modern multicellular choanoflagellates

a fluid-filled body cavity can functions a hydrostatic skeleton because a. fluid are moderately compressible b. fluids are highly compressible c. fluids are relatively incompressible d. fluids have the same density as body tissues e. fluids can be moved by ciliary action

c. fluids are relatively incompressible

In the disease diabetes mellitus, a lack of insulin prevents a. the excretion of glucose in the urine b. glucose breakdown c. glucose uptake from the bloodstream by cells d. the conversion of glucose to glycogen e. the synthesizing of glucose

c. glucose uptake from the bloodstream by cells

Portal blood vessels transport vessels releasing hormones from the ____ to the _____ a. hypothalamus, brain b. hypothalamus, posterior pituitary c. hypothalamus, anterior pituitary d. anterior pituitary, posterior pituitary e. pancreas, liver

c. hypothalamus, anterior pituitary

The hypothalamo-hypophysial portal system of blood vessels connect the __________ to the ___________ a. hypothalamus, brain b. hypothalamus, posterior pituitary c. hypothalamus, anterior pituitary d. anterior pituitary, posterior pituitary e. pancreas, liver

c. hypothalamus, anterior pituitary

Homeostasis refers to the tendency to keep body systems a. matched to the external environment b. the same relative to one another c. in a steady or stable state over time d. under the control of the brain e. at the same specific temperature

c. in a steady or stable state over time

why is bilateral symmetry most beneficial for mobile organisms a. it permits sensory information to be received from any direction b. it correlates with segmentation and increased efficiency of movement c. it allows the most forward portion of the body to sense new environments before entering them d. it is an artifact of evolution and has no benefit e. it makes the organisms more steam lined

c. it allows the most forward portion of the body to sense new environments before entering them

When an ectotherm and an endotherm of the same body size are held in a closed chamber and the temperature is lowered, the a. body temperature of the endotherm decreases b. body temperature of the ectotherm remains stable c. metabolic rate of the endotherm increases d. metabolic rate of the ectotherm increases e. metabolic rate of the endotherm remains stable

c. metabolic rate of the endotherm remains stable

Thyrotropin-releasing hormone (TRH) which is secreted by the hypothalamus causes the anterior pituitary to produce thyroid-stimulating hormone (TSH) which in turn leads the thyroid to produce thyroxine and thyroxine causes a temporary decrease in TRH secretion. This chain of events is an example of _____ feedback a. positive b. corrective c. negative d. runaway e. none of the above

c. negative

Thyrotropin-releasing hormone (TRH) which is secreted by the hypothalamus causes the anterior pituitary to produce thyroid-stimulating hormone (TSH). TSH in turn leads the thyroid to produce thyroxine and thyroxine eventually causes a decrease in TRH secretion. This chain of events is an example of _______ feedback a. positive b. non-corrective c. negative d. runaway e. none of the above

c. negative

Which of the following is a difference between fungi and animals? a. only fungi are heterotrophic b. only animals are multicellular c. only fungi are saprotrophic d. only animals are heterotrophic e. all of the above

c. only fungi are saprotrophic

An important neurotransmitter is acetylcholine which is secreted by axonal endings and diffuses across a synapse to activate receptors in target cells of muscle tissues. Thus, acetylcholine performs its task much like a product of the endocrine system called a(n) a. autocrine b. steroid c. paracrine d. hormone e. receptor

c. paracrine

Which of the following animals lacks distinct tissue types? a. echinoderms b. chordates c. porifera d. insects e. cnidarians

c. porifera

As fruits ripen they emit a chemical called ethylene which attracts several fruit flies. The fruit flies damage the fruit causing more odor to be released which attracts more flies which results in attracting still more flies. This is an example of a. an error signal b. negative feedback c. positive feedback d. feedforward information e. homeostasis

c. positive feedback

The annelid worms (i.e. earthworms) are among the simplest animals in which mesoderm lines both the inner surface of the outer body wall and the outer surface of the gut. Which of the following terms does not apply to these animals? a. triploblastic b. protostomes c. pseudocoelom d. coelom e. bilateral symmetry

c. pseudocoelom

All the hormone produced by the adrenal cortex are a. water-soluble b. proteins c. steroids d. carbohydrates e. tropic hormones

c. steroids

If you were testing newly-identified compounds for the possibility that they serve as hormones which of the following type of molecule would be the least likely to show hormonal activity on the target cells you are testing? a. peptides b. proteins c. carbohydrates d. steroids e. amines

c. steroids

which of the following statements about coelomate is false? a. coelomates are triploblastic b. there is an inner layer of mesoderm surrounding the internal organs in coelomates c. the body cavity of coelomates is filled with mesenchyme d. the body cavity if coelomates can act as a hydrostatic skeleton e. an earthworm is an example of a coelomate

c. the body cavity of coelomates is filled with mesenchyme

Which of the following is an effect of increased levels of antidiuretic hormone in the blood? a. production of milk from mammary tissues b. uterine contractions during birth c. water conservation by the kidneys d. production of thyroxine by the thyroid gland e. production of releasing hormones by the hypothalamus

c. water conservation by the kidney

which of the following does not contribute to evidence that animals have a common ancestor a. animals share similarities in organization and function of genes such as hox genes b. animal cells have unique types of junctions between them c. all animals are heterotrophs that digest food internally d. animal cells have chromosomes contained inside a nucleus e. all animals have a common set of extracellular matrix proteins

d. animal cells have chromosomes contained inside a nucleus

For the most part, the tropic hormones are secreted into the blood by the a. hypothalamus b. gonads c. posterior pituitary d. anterior pituitary e. the target organs of the pituitary hormones

d. anterior pituitary

All of the following are secreted by the anterior pituitary and are hormones that control the activities of other endocrine glands except for a. thyrotropin b. adrenocorticotropin c. luteinizing hormone d. antidiuretic hormone e. follicle stimulating hormone

d. antidiuretic hormone

All of the following are secreted by the anterior pituitary and are hormones that control the activities of other endocrine glands except for a. thyrotropin (TSH) b. adrenocorticotropin (ACTH) c. luteinizing hormone (LH) d. antidiuretic hormone (ADH) e. follicle stimulating hormone (FSH)

d. antidiuretic hormone (ADH)

cephalization is most commonly associated with a. spherical symmetry b. radial symmetry c. sessile animals d. bilateral symmetry e. lophophorate animals

d. bilateral symmetry

Which are endotherms most of the time? a. fishes b. birds and crocodilians c. amphibians d. birds and mammals e. turtles

d. birds and mammals

Vitamin D a. is synthesized by the skin cells b. is also called calciferol c. is a hormone not a vitamin d. is involved in the regulation of calcium e. all of the above

e. all of the above

Why is bilateral symmetry most beneficial for animals that are motile? a. it permits sensory information to be received from all directions at the same time b. correlated with segmentation it contributes to increased efficiency of directional movement c. it allows the anterior end of the body to evaluate new environments before entering them d. both b and c are correct but not a e. choice a, b, and c are all correct

d. both b and c are correct but not a

If you want to make a name for yourself in science by identifying a new type of animal hormone that has never been discovered before, you should focus your research on which the following distinct group of compounds? a. steroids b. proteins c. peptides d. carbohydrates e. amines

d. carbohydrates

Organisms that depend largely on external sources of heat to maintain body temperature are called a. homeothermic b. endothermic c. heterothermic d. ectotherms e. mesothermic

d. ectotherms

Which of the following statements about hormones, hormone-producing cells, and target cells is false? a. target cells have receptors for binding the hormone they are targeted for b. some endocrine cells exist as single cells within tissue c. all hormones travel in the blood to target cells d. endocrine glands lack ducts that lead to the outside of the body e. both a and b

d. endocrine glands lack ducts that lead to the outside of the body

which statement about pseudocoelomate is true a. mesenchyme fills the body cavity b. a predator that drifts through the ocean c. a muscular layer (peritoneum derived from the mesoderm covers organs and lines the body cavity d. mesoderm lines the body cavity but does not surround organs e. it typically moves by movement of cilia

d. it typically moves by movement of cilia

Which of the following is not a feature of the sponges? a. choanocytes b. pores c. spicules d. mesoderm e. eggs

d. mesoderm

Which phylum of animals were thought by early naturalists to be plants because they were sessile and lacked body symmetry? a. nematoda b. cnidaria c. echinodermata d. porifera e. choaneflagellate

d. porifera

Which of the following is an important adaptation of animals to cold climates? a. increased tendency to shiver b. thinner layers of body fat c. reduced density of fur or feathers d. reduced surface area-to-volume ratio e. increased flow of blood to surface

d. reduced surface-to-volume ratio

Which of the following statements is true? a. in deuterostome animals the embryonic mouth originates from the blastopore b. diploblastic animals have two embryonic tissue layers - an outer ectoderm and an inner mesoderm c. the members of the phylum Porifera are all triploblastic because they possess an ectoderm, a mesoderm, and an endotherm d. the mouth in protostomes originates from the embryonic blastopore e. the protostome anus originates from the embryonic blastopore

d. the mouth in protostomes originates from the embryonic blastopore

One of the following animal phyla consists of animals that are mostly asymmetrical. Which one is it? a. the echinodermata b. the platyhelminthes c. the cnidaria d. the porifera e. the nematoda

d. the porifera

Which of the following is an anatomical feature possessed by endotherms that reduces heat loss? a. round body shape b. short appendages c. extensive thermal insulation d. decreased surface area-to-volume as size increases e. all of the above

e. all of the above

Which of the following statements about hormones is true? a. the same hormone can cause different responses in different types of cells b. a hormone will bind to every cell that has a receptor for that hormone c. by definition, hormones act on target cells at some distance from the source of the hormone d. the receptor for a hormone may be in the plasma membrane or inside the cell e. all of the above

e. all of the above

Which of the following statements about hormones is true? a. the same hormone can cause different responses in different types of cells b. a hormone will bind to every cell that has a receptor for that hormone c. the receptor for a hormone may be on the secreting cell itself d. the receptor for a hormone may be in the plasma membrane or inside the cell e. all of the above

e. all of the above

Which of the following would you expect to find in endotherms living in colder climates when compared to their close relatives living in warmer climates? a. smaller surface-to-volume ratios b. rounder body shapes c. shorter appendages d. thicker insulation e. all of the above

e. all of the above

clues to the monophyletic evolutionary relationships of animals can be found in a. fossil records b. patterns of embryonic development c. comparative cellular morphology and physiology d. genomic sequence patterns e. all of the above

e. all of the above

which type of symmetry is most often seen in an animal that is mobile a. asymmetry b. spherical symmetry c. radial symmetry d. radial symmetry with identical halves e. bilateral symmetry

e. bilateral symmetry

When compared with ectotherms, endotherms a. have cells that are most efficient at using energy b. have cells that are more leaky to sodium ions c. expend less energy to maintain concentration gradients of K+ and Na+ d. have cells that are less efficient at using energy e. both b and d

e. both b and d

Which of the following animals are endotherms a. fishes b. lizards c. mammals d. birds e. both c and d

e. both c and d

Steroid hormones a. usually bind to carrier proteins to be transported in the blood to their target cells b. bind with receptor proteins in the plasma membrane c. are synthesized from cholesterol d. are lipid soluble e. choice a b and d are correct but not choice b

e. choice a b and d are correct but not choice b

If an animal has an anterior end that is distinguishable from its posterior end and also has both dorsal and ventral aspects then a. it must be a deuterostome b. it must be an annelid worm c. it must be triploblastic d. its embryonic blastopore must be its mouth e. it must also have left and right sides and therefore be bilateral in symmetry

e. it must also have left and right sides and therefore be bilateral in symmetry

Experiments with animals have suggested that the actions of which of the following hormones foster parental caretaking toward young offspring as well as feelings of sexual attraction between prospective mates? a. follicle stimulating hormone b. gonadotropin hormone c. antidiuretic hormone d. testosterone e. oxytocin

e. oxytocin

In response to 10C ride in environment temperature, an endothermic body temperature will a. rise at a constant rate b. fall at a constant rate c. fall to a point then become stable d. rise to a point then become stable e. remain relatively constant

e. remain relatively constant

which of the following statements about segmentation in animals is false? a. segmentation facilitates the specialization of functions in different parts of the body b. segmentation results in improved control of animal movements c. segmentation occurs in chordates d. segmentation occurs in certain protostome groups e. segmented animals are all diploblastic

e. segmented animals are all diploblastic

which of the following statements about the symmetry of organisms is false? a. radial symmetry is common in ctenophores and cnidarians b. radial symmetry is common in segmented animals c. spherical symmetry is common in unicellular protists d. the back of a bilaterally symmetrical organism is the dorsal surface e. sensory organs in a bilaterally symmetrical organism are concentrated at the anterior end of the organism

e. sensory organs in a bilaterally symmetrical organism are concentrated at the anterior end of the organism

Which of the following statements about the body cavity of animals is true a. the body cavity of coelomates develops from the embryonic ectoderm b. the body cavity of acoelomates is filled with liquid c. the pseudocoel of the pseudocoelomates has a peritoneum d. the acoelomates do not have an enclosed body cavity e. the coelomates have a body cavity surrounded by peritoneum

e. the coelomates have a body cavity surrounded by peritoneum

Which statement about peptide and protein hormones is false? a. they make up the majority of hormones b. the affect cells from the outside c. they are water soluble d. receptors are found on cell surfaces e. they can diffuse through the plasma membrane

e. they can diffuse through the plasma membrane

Which statement about peptide and protein hormones is false? a. they make up the majority of hormones b. they affect cells from the outside c. they are water soluble d. receptors are found on the cell surface e. they can diffuse through the plasma membrane

e. they can diffuse through the plasma membrane

which of the following statements is true a. the deuterostomes mouth originates from the blastopore b. diploblastic organisms have two embryonic layers, an outer ectoderm and an inner mesoderm c. cnidaria have two embryonic layers, an outer endoderm and an inner ectoderm d. the protostome mouth originates from a second layer opening after formation of the blastopore e. triploblastic organisms have three embryonic layers, an outer ectoderm, a mesoderm, and an inner endoderm

e. triploblastic organisms have three embryonic layers, an outer ectoderm, a mesoderm, and an inner endoderm