Chapter 33 Invertebrates Multiple Choice Questionslive.ispatula.site/1st_Year/2nd_Semester/Biology2/test... · 2017-09-14 · Chapter 33 Invertebrates Multiple-Choice Questions 1)

Chapter 33 InvertebratesMultiple-Choice Questions

1) Which cells in a sponge are primarily responsible for trapping and removing food particles from circulatingwater?

A) choanocytesB) mesoglea cellsC) pore cells (porocytes)D) epidermal cells

Answer: ATopic: Concept 33.1Skill: Knowledge/Comprehension

2) Which of the following is correctly associated with sponges?A) osculumB) body cavityC) cnidocytesD) spicules made of chitinE) muscle cells and nerve cells


3) A spongeʹs structural materials (spicules, spongin) are manufactured by theA) pore cells.B) epidermal cells.C) choanocytes.D) zygotes.E) amoebocytes.

Answer: ETopic: Concept 33.1Skill: Knowledge/Comprehension

4) Which of these can be observed in the mesohyl of various undisturbed sponges at one time or another?1. amoebocytes2. spicules3. spongin4. zygotes5. choanocytes

A) 1 onlyB) 1 and 2C) 1, 2, and 3D) 1, 2, 3, and 4E) all five of these

Answer: DTopic: Concept 33.1Skill: Knowledge/Comprehension

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5) Which chemical is synthesized by some sponges and acts as an antibiotic?A) streptomycinB) sponginC) calcium carbonateD) silicaE) cribrostatin


Figure 33.1

6) Which of these factors, when used to label the horizontal axis of the graph in Figure 33.1, would account mostdirectly for the shape of the plot?

A) spongin concentration (gm/unit volume)B) rate of cribrostatin synthesis (molecules/unit time)C) number of pores per spongeD) number of spicules per spongeE) number of choanocytes per sponge

Answer: ETopic: Concept 33.1Skill: Synthesis/Evaluation

7) In terms of food capture, which sponge cell is most similar to the cnidocyte of a Cnidarian?A) zygoteB) choanocyteC) gameteD) epidermal cellE) pore cell

Answer: BTopic: Concepts 33.1-33.2Skill: Knowledge/Comprehension

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8) A radially symmetrical animal that has two embryonic tissue layers probably belongs to which phylum?A) PoriferaB) CnidariaC) PlatyhelminthesD) NematodaE) Echinodermata

Answer: BTopic: Concept 33.2Skill: Knowledge/Comprehension

9) Which of the following are characteristics of the phylum Cnidaria?1. a gastrovascular cavity2. a polyp stage3. a medusa stage4. cnidocytes5. a pseudocoelom

A) 1 and 4B) 2 and 3C) 2, 3, and 4D) 1, 2, 3, and 4E) all five of these


10) Which of the following is true of members of the phylum Cnidaria?A) They are not capable of locomotion because they lack true muscle tissue.B) They are primarily filter feeders.C) They have either or both of two body forms: mobile polyps and sessile medusae.D) They may use a gastrovascular cavity as a hydrostatic skeleton.E) They are the simplest organisms with a complete alimentary canal (two openings).


11) The members of which class of the phylum Cnidaria occur only as polyps?A) HydrozoaB) ScyphozoaC) AnthozoaD) CubozoaE) both B and D

Answer: CTopic: Concept 33.2Skill: Knowledge/Comprehension

12) Which class of the phylum Cnidaria includes ʺjelliesʺ with rounded (as opposed to boxlike) medusae?A) HydrozoaB) ScyphozoaC) AnthozoaD) CubozoaE) Both A and C are referred to as ʺjellies.ʺ


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13) Corals are most closely related to which group?A) jelliesB) freshwater hydrasC) sea anemonesD) spongesE) barnacles


14) Which characteristic is shared by both cnidarians and flatworms?A) dorsoventrally flattened bodiesB) flame bulbsC) radial symmetryD) a digestive system with a single openingE) both A and D

Answer: DTopic: Concepts 33.2, 33.3Skill: Knowledge/Comprehension

15) Generally, members of which flatworm class(es) are nonparasitic?A) TurbellariaB) TrematodaC) CestodaD) MonogeneaE) A, C, and D


16) In a small stream, you pick up a rock and observe many small, flattened worms crawling on its undersurface.You decide that they belong to the phylum Platyhelminthes. To which class do they probably belong?

A) CestodaB) MonogeneaC) TurbellariaD) Trematoda

Answer: CTopic: Concept 33.3Skill: Application/Analysis

17) What would be the most effective method of reducing the incidence of blood flukes in a human population?A) Reduce the mosquito population.B) Reduce the freshwater snail population.C) Purify all drinking water.D) Avoid contact with rodent droppings.E) Carefully wash all raw fruits and vegetables.

Answer: BTopic: Concept 33.3Skill: Application/Analysis

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18) The larvae of many common tapeworm species that infect humans are usually foundA) encysted in freshwater snails.B) encysted in the muscles of an animal, such as a cow or pig.C) crawling in the abdominal blood vessels of cows and pigs.D) encysted in the human brain.E) crawling in the intestines of cows and pigs.


19) While vacationing in a country that lacks adequate meat inspection, a student ate undercooked ground beef.Sometime later the student became easily fatigued, and lost body weight. At about the same time, whitish,flattened, rectangular objects full of small white spheres started appearing in his feces. Administration ofniclosamide cured the problem. The student had probably been infected by a

A) pinworm.B) hookworm.C) nematode.D) tapeworm.E) proboscis worm.

Answer: DTopic: Concept 33.3Skill: Application/Analysis

20) Which of the following correctly characterizes the phylum Rotifera?A) a single-opening digestive tractB) a pair of mandibles made of chitinC) parthenogenic reproductionD) inability to persist in environments where they might undergo desiccationE) a relatively large size


21) Which of the following statements about tapeworm feeding methods is correct?A) They have complete digestive tracts.B) They use degenerate mouths to ingest some of their food.C) As adults, they live and feed in the hostʹs bloodstream.D) They are autotrophic.E) They absorb nutrients across their body walls.


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22) While sampling marine plankton in a lab, a student encounters large numbers of fertilized eggs. The studentrears some of the eggs in the laboratory for further study and finds that the blastopore becomes the mouth. Theembryo develops into a trochophore larva and eventually has a true coelom. These eggs probably belonged toa(n)

A) chordate.B) echinoderm.C) mollusc.D) nematode.E) arthropod.


23) A lophophore is used by ectoprocts and brachiopodsA) for locomotion.B) at a larval stage.C) for feeding.D) for sensory reception.E) as a skeletal system.


24) A brachiopod can be distinguished from a bivalve by the presence ofA) two hinged shells.B) a digestive system with separate mouth and anus.C) a lophophore.D) suspension feeding.E) a distinct head.


25) If a lung were to be found in a mollusc, where would it be located?A) mantle cavityB) coelomC) footD) visceral massE) excurrent siphon


26) Which molluscan class includes members that undergo embryonic torsion?A) chitonsB) bivalvesC) gastropodsD) cephalopods


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27) A terrestrial mollusc without a shell belongs to which class?A) chitonsB) bivalvesC) gastropodsD) cephalopods


28) Which molluscan class includes marine organisms whose shell consists of eight plates?A) chitonsB) bivalvesC) gastropodsD) cephalopods


29) A radula is present in members of which class(es)?A) chitonsB) bivalvesC) gastropodsD) cephalopods


30) While snorkeling, a student observes an active marine animal that has a series of muscular tentacles bearingsuckers associated with its head. Segmentation is not observed, but a pair of large, well-developed eyes isevident. The student is observing an animal belonging to which class?

A) chitonsB) bivalvesC) gastropodsD) cephalopods


31) Which molluscan class includes organisms that are primarily suspension feeders?A) chitonsB) bivalvesC) gastropodsD) cephalopods


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32) Of the annelid classes below, which have parapodia?A) OligochaetaB) PolychaetaC) Hirudinea (leeches)D) all three of theseE) two of these


33) Many of which of the following annelid classes are parasites?A) OligochaetaB) PolychaetaC) Hirudinea (leeches)D) all three of theseE) two of these


34) Of the annelid classes below, which have externally segmented bodies?A) OligochaetaB) PolychaetaC) Hirudinea (leeches)D) all three of theseE) two of these


35) Of the annelid classes below, which make castings that are agriculturally important?A) OligochaetaB) PolychaetaC) Hirudinea (leeches)D) all three of theseE) two of these


36) The name of which of the following annelid classes indicates the relative number of bristles (chaetae) itsmembers have?

A) OligochaetaB) PolychaetaC) Hirudinea (leeches)D) all three of theseE) two of these


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37) Some species of which of the following annelid classes release an anticoagulant that is of medical significance?A) OligochaetaB) PolychaetaC) Hirudinea (leeches)D) all three of theseE) two of these


38) Which of the following is found only among annelids?A) a hydrostatic skeletonB) segmentationC) a clitellumD) a closed circulatory systemE) a cuticle made of chitin


39) Which of the following is a characteristic of nematodes?A) All species can be characterized either as scavengers or as decomposers.B) They have only longitudinal muscles.C) They have a true coelom.D) They have a gastrovascular cavity.E) Many species are diploblastic.


40) Humans most frequently acquire trichinosis byA) having sexual contact with an infected partner.B) eating undercooked pork.C) inhaling the eggs of worms.D) eating undercooked beef.E) being bitten by tsetse flies.


41) Which of the following can be used to distinguish a nematode worm from an annelid worm?1. type of body cavity2. number of muscle layers in the body wall3. presence of segmentation4. number of embryonic tissue layers5. shape of worm in cross-sectional view

A) 2 onlyB) 2 and 3C) 1, 2, and 3D) 1, 2, 3, and 5E) all five of these


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42) Nematode worms and annelid worms share which of the following features?A) use of fluid in the body cavity as a hydrostatic skeletonB) ecdysisC) presence of a circulatory systemD) presence of segmentationE) absence of species with parasitic lifestyles


43) A student observes a worm-like organism crawling about on dead organic matter. Later, the organism shedsits outer covering. One possibility is that the organism is a larval insect (like a maggot). On the other hand, itmight be a member of which phylum, and one way to distinguish between the two possibilities is by lookingfor the presence of

A) Platyhelminthes; a cuticle of chitin.B) Nematoda; an alimentary canal.C) Annelida; a body cavity.D) Nematoda; a circulatory system.E) Annelida; muscle in the body wall.


44) The heartworms that can accumulate within the hearts of dogs and other mammals have a pseudocoelom, analimentary canal, and an outer covering that is occasionally shed. To which phylum does the heartwormbelong?

A) PlatyhelminthesB) ArthropodaC) NematodaD) AcoelaE) Annelida


45) Infection with which parasite might cause excessive elasticity in human skeletal muscles?A) trichinella wormsB) tapewormsC) copepodsD) blood flukesE) rotifers


46) Which of the following are entirely, or partly, composed of calcium carbonate?A) spicules of siliceous spongesB) coral animalsʹ exoskeletonsC) molluscsʹ mantlesD) insectsʹ cuticlesE) nematodesʹ cuticles

Answer: BTopic: Concepts 33.1-33.4Skill: Knowledge/Comprehension

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47) Which of the following are characteristics of arthropods?1. protostome development2. bilateral symmetry3. a pseudocoelom4. three embryonic germ layers5. a closed circulatory system

A) 1 and 2B) 2 and 3C) 1, 2, and 4D) 2, 3, and 5E) 3, 4, and 5


48) Among the invertebrate phyla, phylum Arthropoda is unique in possessing members that haveA) a cuticle.B) a ventral nerve cord.C) open circulation.D) wings.E) segmented bodies.


49) A shared derived characteristic for members of the arthropod subgroup that includes spiders would be thepresence of

A) chelicerae.B) an open circulatory system.C) an exoskeleton.D) a cuticle.E) a cephalothorax.


50) You find a small animal with eight legs crawling up your bedroom wall. Closer examination will probablyreveal that this animal has

A) antennae.B) no antennae.C) chelicerae.D) A and CE) B and C


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51) While working in your garden, you discover a worm-like, segmented animal with two pairs of jointed legs persegment. The animal is probably a

A) millipede.B) caterpillar.C) centipede.D) polychaete worm.E) sow bug.


52) Which of the following characteristics most likely explains why insects are so successful at dispersing to distantenvironments?

A) hemocoelB) wingsC) jointed appendagesD) chewing mandiblesE) internal fertilization


53) What distinguishes complete metamorphosis from incomplete metamorphosis in insects?A) presence of wings in the adult, but not in earlier life stagesB) presence of sex organs in the adult, but not in earlier life stagesC) radically different appearance between adults and earlier life stagesD) only A and BE) A, B, and C


54) A terrestrial animal species is discovered with the following larval characteristics: exoskeleton, system of tubesfor gas exchange, and modified segmentation. A knowledgeable zoologist should predict that its adults wouldalso feature

A) eight legs.B) two pairs of antennae.C) a sessile lifestyle.D) an open circulatory system.E) parapodia.


55) The possession of two pairs of antennae is a characteristic ofA) spiders.B) insects.C) centipedes.D) millipedes.E) crustaceans.


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56) One should expect to find the ʺ9 + 2 patternʺ of microtubules in association with the feeding apparatus of whichof the following?

A) annelidsB) coral animalsC) tapewormsD) spongesE) terrestrial insects

Answer: DTopic: Concepts 33.1-33.4Skill: Application/Analysis

57) Which of the following is a characteristic of adult echinoderms?A) secondary radial symmetryB) spiral cleavageC) gastrovascular cavityD) exoskeletonE) lophophore


58) Which of the following can extend the stomach through their mouth to feed?A) class Crinoidea (sea lilies and feather stars)B) class Asteroidea (sea stars)C) class Ophiuroidea (brittle stars)D) class Echinoidea (sea urchins and sand dollars)E) class Holothuroidea (sea cucumbers)


59) Which of the following have distinct central disks and long, flexible arms?A) class Crinoidea (sea lilies and feather stars)B) class Asteroidea (sea stars)C) class Ophiuroidea (brittle stars)D) class Echinoidea (sea urchins and sand dollars)E) class Holothuroidea (sea cucumbers)


60) Which of the following are elongated in the oral-aboral axis?A) class Crinoidea (sea lilies and feather stars)B) class Asteroidea (sea stars)C) class Ophiuroidea (brittle stars)D) class Echinoidea (sea urchins and sand dollars)E) class Holothuroidea (sea cucumbers)


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61) Which of the following have a mouth that is directed upward?A) class Crinoidea (sea lilies and feather stars)B) class Asteroidea (sea stars)C) class Ophiuroidea (brittle stars)D) class Echinoidea (sea urchins and sand dollars)E) class Holothuroidea (sea cucumbers)


62) Which of the following can have long, movable spines?A) class Crinoidea (sea lilies and feather stars)B) class Asteroidea (sea stars)C) class Ophiuroidea (brittle stars)D) class Echinoidea (sea urchins and sand dollars)E) class Holothuroidea (sea cucumbers)


63) Which of the following describe(s) echinoderms?A) They have an endoskeleton of hard calcareous plates.B) Tube feet provide motility in most species.C) They have a pseudocoelom.D) Only A and B are true.E) A, B, and C are true.


64) An organism is able to extend its feeding structure(s) through a hole in its body wall. If the organism were a seastar, it would extend its

A) stomach.B) lophophore.C) pharynx.D) mandibles.E) tentacles.


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The following questions refer to the paragraph below.

A farm pond, usually dry during winter, has plenty of water and aquatic pond life during the summer. One summer, Sarahreturns to the family farm from college. Observing the pond, she is fascinated by some six-legged organisms that can crawlabout on submerged surfaces or, when disturbed, seemingly ʺjetʺ through the water. Watching further, she is able toconclude that the ʺmystery organismsʺ are ambush predators, and their prey includes everything from insects to small fishand tadpoles.

65) From this description, one can conclude that the organisms that have caught Sarahʹs attention areA) insects.B) crustaceans.C) aquatic spiders.D) myriapods.E) eurypterids.

Answer: ATopic: Concept 33.5Skill: Application/Analysis

66) Sarah noticed the presence of many empty exoskeletons attached to emergent vegetation. These exoskeletonslooked exactly like those of the largest of the ʺmystery organismsʺ she had seen in the pond. They also lookedsimilar to the bodies of the dragonflies that patrolled the surface of the pond. If Sarah had learned a lot fromher college biology class, what should she have concluded about the mysterious pond organisms?

A) They are larval dragonflies, destined to undergo incomplete metamorphosis.B) They are larval dragonflies, destined to undergo complete metamorphosis.C) They are adult dragonflies, so old that they can no longer fly, have fallen into the pond, but have not yet

drowned.D) They are adult dragonflies that must, like many amphibian species, return to water in order to mate.


67) If the pond organisms are larvae, rather than adults, Sarah should expect them to have all of the followingstructures, except

A) antennae.B) an open circulatory system.C) an exoskeleton of chitin.D) complex eyes.E) sex organs.

Answer: ETopic: Concept 33.5Skill: Application/Analysis

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68) Sarah observed that the mystery pond organisms never come up to the pondʹs surface. If she catches one ofthese organisms and observes closely, perhaps dissecting the organism, she should find1. gills.2. spiracles.3. tracheae.

A) 1 onlyB) 3 onlyC) 1 and 3D) 2 and 3E) 1, 2, and 3


69) Sarah had learned that ancestral (Carboniferous era) dragonfly species were much larger than extant dragonflyspecies are, with wingspans of 70 cm. This struck her as odd, because she had also learned that one of thethings that keeps insects small is their relatively inefficient respiratory system. Which two hypotheses mighthelp account for the large size of ancestral dragonflies?1. If the atmosphere during the Carboniferous had featured a higher oxygen content than the modernatmosphere, then tracheae might have been sufficient means for oxygen delivery to the interior tissues.2. If large size was a drawback, then the large dragonflies underwent extinction, which explains why all extantdragonflies are smaller.3. If the ancestral dragonflies had possessed muscles that permitted effective ventilation of the tracheae, thenthe tracheae might have been sufficient means for oxygen delivery to the interior tissues.4. If ancestral dragonflies existed during greenhouse conditions, then they must have survived by decreasingtheir activity levels, no longer capturing prey in flight. Thus, for them, an ineffective respiratory system wassufficient.

A) 1 and 2B) 1 and 3C) 1 and 4D) 2 and 3E) 2 and 4

Answer: ATopic: Concept 33.5Skill: Synthesis/Evaluation

70) A stalked, sessile marine organism has several feathery feeding structures surrounding an opening throughwhich food enters. The organism could potentially be a cnidarian, a lophophorate, a tube-dwelling worm, acrustacean, or an echinoderm. Finding which of the following in this organism would allow the greatestcertainty of identification?

A) the presence of what seems to be radial symmetryB) a hard covering made partly of calcium carbonateC) a digestive system with mouth and anus separate from each otherD) a water vascular systemE) a nervous system


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71) Which of the following animal groups is entirely aquatic?A) MolluscaB) CrustaceaC) EchinodermataD) ArthropodaE) Annelida

Answer: CTopic: Concepts 33.2 —33.5Skill: Knowledge/Comprehension

72) In a tide pool, a student encounters an organism with a hard outer covering that contains much calciumcarbonate, an open circulatory system, and gills. The organism could potentially be a crab, a shrimp, a barnacle,or a bivalve. Which structure below would allow for the most certain identification?

A) a mantleB) a heartC) a body cavityD) a lophophoreE) eyes

Answer: ATopic: Concepts 33.2 —33.5Skill: Application/Analysis

73) Protostomes that have an open circulatory system and an exoskeleton of chitin are part of which phylum?A) CnidariaB) AnnelidaC) MolluscaD) ArthropodaE) Echinodermata

Answer: DTopic: Concepts 33.2 —33.5Skill: Knowledge/Comprehension

74) Protostomes with a unique drape of tissue that may secrete a shell are part of which phylum?A) CnidariaB) AnnelidaC) MolluscaD) ArthropodaE) Echinodermata

Answer: CTopic: Concepts 33.2 —33.5Skill: Knowledge/Comprehension

75) Which of the following is a diploblastic phylum of aquatic predators?A) CnidariaB) AnnelidaC) MolluscaD) ArthropodaE) Echinodermata

Answer: ATopic: Concepts 33.2—33.5Skill: Knowledge/Comprehension

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76) Deuterostomes that have an endoskeleton are part of which phylum?A) CnidariaB) AnnelidaC) MolluscaD) ArthropodaE) Echinodermata

Answer: ETopic: Concepts 33.2—33.5Skill: Knowledge/Comprehension

77) Protostomes that have a closed circulatory system and obvious segmentation are part of which phylum?A) CnidariaB) AnnelidaC) MolluscaD) ArthropodaE) Echinodermata

Answer: BTopic: Concepts 33.2—33.5Skill: Knowledge/Comprehension

The following questions refer to the paragraph below.

An elementary school science teacher decided to liven up the classroom with a salt-water aquarium. Knowing thatsalt-water aquaria can be quite a hassle, the teacher proceeded stepwise. First, the teacher conditioned the water. Next, theteacher decided to stock the tank with various marine invertebrates, including a polychaete, a siliceous sponge, severalbivalves, a shrimp, several sea anemones of different types, a colonial hydra, a few coral species, an ectoproct, a sea star, andseveral gastropod varieties. Lastly, some vertebrates–a parrotfish and a clownfish–were added. She arranged for dailyfeedings of copepods and feeder fish.

78) One day, little Tommy (a student in an under-supervised class of 40 fifth graders) got the urge to pet Nemo(the clownfish) who was swimming among the waving petals of a pretty underwater ʺflowerʺ that had a bighole in the midst of the petals. Tommy giggled upon finding that these petals were sticky feeling. A few hourslater, Tommy was in the nurseʹs office with nausea and cramps. Microscopic examination of his fingers wouldprobably have revealed the presence of

A) teeth marks.B) spines.C) spicules.D) nematocysts.E) a radula.

Answer: DTopic: Concepts 33.2—33.5Skill: Application/Analysis

79) Parrotfish have mouths adapted to scrape algae off of coral, and can even munch on coral. The aquariumʹscorals rapidly dwindled; in their place were shards of

A) chitin.B) calcium carbonate.C) silica.D) bone.E) chitin impregnated with calcium carbonate.

Answer: BTopic: Concepts 33.2—33.5Skill: Application/Analysis

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80) The species in the aquarium that possess true bilateral symmetry include the1. sponges.2. molluscs.3. echinoderm.4. sea anemones.5. ectoprocts.

A) 2 onlyB) 1 and 4C) 2 and 5D) 2, 3, and 5E) 2, 3, 4, and 5

Answer: CTopic: Concepts 33.2—33.5Skill: Application/Analysis

81) If the teacher wanted to show the students what a lophophore is, and how it works, the teacher would pointout a feeding

A) hydra.B) sponge.C) bivalve.D) gastropod.E) ectoproct.

Answer: ETopic: Concepts 33.2—33.5Skill: Application/Analysis

82) The bivalves started to die one by one; only the undamaged shells remained. To keep the remaining bilvalvesalive, the teacher would have had to remove the

A) sea anemones.B) sea star.C) gastropods.D) ectoprocts.E) parrotfish.


83) If the teacher had used a dissecting microscope to examine the outer surfaces of the empty bivalve shells, theteacher would probably have seen marks that had been left by

A) jaws.B) nematocysts.C) tube feet.D) a lophophore.E) a madreporite.

Answer: CTopic: Concepts 33.2—33.5Skill: Application/Analysis

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84) The teacher was unaware of the difference between suspension feeding and predation. The teacher thoughtthat by providing live copepods (2 mm long) and feeder fish (2 cm long) the dietary needs of all of theorganisms would be satisfied. Consequently, which two organisms would have been among the first to starveto death (assuming they lack photosynthetic endosymbionts)?1. sponges2. coral animals3. bivalves4. sea stars5. shrimp

A) 1 and 2B) 1 and 3C) 2 and 5D) 3 and 4E) 4 and 5


85) If the teacher had wanted to demonstrate that some invertebrates possess a closed circulatory system, theteacher should have removed and dissected a

A) mollusc.B) sea star.C) shrimp.D) polychaete.E) parrotfish.


86) Had the teacher wanted to point out organisms that belong to the most successful animal phylum, the teachershould have chosen the1. bivalves.2. sea anemones.3. shrimp.4. polychaete.5. copepods.

A) 1 onlyB) 4 onlyC) 3 and 5D) 4 and 5E) 1, 2, and 3

Answer: CTopic: Concepts 33.2-33.5Skill: Application/Analysis

87) The clownfish readily swims among the tentacles of the sea anemones; the parrotfish avoids them. Onehypothesis for the clownfishʹs apparent immunity is that these fish slowly build a tolerance to the seaanemoneʹs toxin. A second hypothesis is that a chemical in the mucus that coats the clownfish prevents thenematocysts from being triggered. Which of the following graphs supports the first, but not the second, of thesehypotheses? (The clownfish, which had never before been in the presence of a sea anemone, and sea anemoneswere introduced to the same aquarium at Time 0.)

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A)

B)

C)

D)

Answer: BTopic: Concepts 33.2 —33.5Skill: Synthesis/Evaluation

88) The clownfish readily swims among the tentacles of the sea anemones; the parrotfish avoids them. Onehypothesis for the clownfishʹs apparent immunity is that they slowly build a tolerance to the sea anemoneʹstoxin. A second hypothesis is that a chemical in the mucus that coats the clownfish prevents the nematocystsfrom being triggered. Which of these findings would lend the greatest support to the second hypothesis?

A) Upon close examination, clownfish maneuverability is so precise as to allow it to avoid contacting anytentacles.

B) Clownfishes can eat the dead tentacles of the sea anemones.C) Clownfishes are immune to the toxins of not just one, but many species of sea anemone.D) Clownfish mucus contains a chemical very similar to one found in the trigger mechanism of sea anemone

nematocysts.Answer: DTopic: Concepts 33.2 —33.5Skill: Synthesis/Evaluation

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89) The clownfish readily swims among the tentacles of the sea anemones; the parrotfish avoids them. Onehypothesis for the clownfishʹs apparent immunity is that they slowly build a tolerance to the sea anemoneʹstoxin. A second hypothesis is that a chemical in the mucus that coats the clownfish prevents the nematocystsfrom being triggered. Which of the following graphs supports the second, but not the first, of these hypotheses?

A)

B)

C)

D)

Answer: CTopic: Concept 33.2 —33.5Skill: Synthesis/Evaluation

90) The clownfish and parrotfish died on the same day. Autopsies revealed the presence of many small, flat wormsusing tiny suckers to attach to the fish gills. Most likely, these worms were members of which phylum, andwhich class?

A) Annelida, HirudineaB) Annelida, PolychaetaeC) Platyhelminthes, CestodaD) Platyhelminthes, MonogeneaE) Platyhelminthes, Turbellaria

Answer: DTopic: Concepts 33.2 —33.5Skill: Application/Analysis

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91) If the worms discovered during the autopsies have all features characteristic of their phylum, dissection of theworms should reveal the presence of1. nephridia.2. chaetae.3. segmentation.4. a gastrovascular cavity.5. the acoelomate condition.

A) 5 onlyB) 1 and 2C) 4 and 5D) 1, 2, and 3E) 3, 4, and 5

Answer: CTopic: Concepts 33.2 —33.5Skill: Application/Analysis

92) The teacher and class were especially saddened when the colonial hydrozoan died. They had watched itcarefully, and the unfortunate creature never even got to produce offspring by budding. Yet, everyone waselated when Tommy (now recovered) noticed a small colonial hydrozoan growing in a part of the tank far fromthe location of the original colony. The teacher, who proclaimed a miracle, was apparently unaware that thesehydrozoans exhibit

A) spontaneous generation.B) abiogenesis.C) alternation of generations.D) ecdysis.E) a medusa stage.

Answer: ETopic: Concepts 33.2 —33.5Skill: Application/Analysis

Self-Quiz Questions1) Which two main clades branch from the most recent common ancestor of the eumetazoans?

A) Calcarea and SiliceaB) Lophotrochozoa and EcdysozoaC) Cnidaria and BilateriaD) Rotifera and DeuterostomiaE) Deuterostomia and Bilateria

Answer: CTopic:Skill:

2) A land snail, a clam, and an octopus all shareA) a mantle.B) a radula.C) gills.D) embryonic torsion.E) distinct cephalization.

Answer: ATopic:Skill:

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3) Which phylum is characterized by animals that have a segmented body?A) CnidariaB) PlatyhelminthesC) SiliceaD) ArthropodaE) Mollusca

Answer: DTopic:Skill:

4) Which of the following characteristics is probably most responsible for the great diversification of insects onland?

A) segmentationB) antennaeC) eyesD) bilateral symmetryE) exoskeleton

Answer: ETopic:Skill:

5) The water vascular system of echinodermsA) functions as a circulatory system that distributes nutrients to body cells.B) functions in locomotion, feeding, and gas exchange.C) is bilateral in organization, even though the adult animal is not bilaterally symmetrical.D) moves water through the animalʹs body during suspension feeding.E) is analogous to the gastrovascular cavity of flatworms.

Answer: BTopic:Skill:

6) Which of the following combinations of phylum and description is incorrect?A) Echinodermatabilateral symmetry as a larva, coelom presentB) Nematodaroundworms, pseudocoelomateC) Cnidariaradial symmetry, polyp and medusa body formsD) Platyhelminthesflatworms, gastrovascular cavity, acoelomateE) Calcareagastrovascular cavity, coelom present

Answer: ETopic:Skill:

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Chapter 33 Invertebrates Multiple Choice Questionslive.ispatula.site/1st_Year/2nd_Semester/Biology2/test... · 2017-09-14 · Chapter 33 Invertebrates Multiple-Choice Questions 1)