chapter 33 - animals

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1) What are the cells in a sponge that are primarily responsible for trapping food particles from circulating water?
A) amoebocytes
B) choanocytes
C) mesohyl cells
D) pore cells (porocytes)
E) epidermal cells

B) choanocytes

2) Although a diverse group, all cnidarians are characterized by
A) a gastrovascular cavity.
B) an alternation between a medusa and a polyp stage.
C) some degree of cephalization.
D) muscle tissue of mesodermal origin.
E) the complete absence of asexual reproduction.

A) a gastrovascular cavity.

3) A structurally complex sponge would be expected to have
A) a multi-branched spongocoel.
B) wandering amoebocytes.
C) multiple oscula.
D) A and B only
E) A, B, and C

E) A, B, and C
A) a multi-branched spongocoel.
B) wandering amoebocytes.
C) multiple oscula.

4) A sponge's skeletal materials (spicules, spongin) are manufactured by the
A) pore cells.
B) epidermal cells.
C) choanocytes.
D) zygotes.
E) amoebocytes.

E) amoebocytes.

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

A) a mantle.

6) Which chemical is not normally found in any sponges?
A) chitin
B) spongin
C) calcium carbonate
D) silica
E) cribrostatin

A) chitin

7) The water vascular system of echinoderms
A) 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 has radial anatomy.
D) moves water through the animal's body during suspension feeding.
E) is analogous to the gastrovascular cavity of flatworms.

B) functions in locomotion, feeding, and gas exchange.

8) In terms of food capture, which sponge cell is most similar to the cnidocyte?
A) amoebocyte
B) choanocyte
C) gamete
D) epidermal cell
E) pore cell

B) choanocyte

9) A radially symmetrical animal that has two embryonic tissue layers belongs to which phylum?
A) Porifera
B) Cnidaria
C) Platyhelminthes
D) Nematoda
E) Echinodermata

B) Cnidaria

10) Which of these is a characteristic of sea stars?
A) a closed circulatory system
B) nephridia
C) a brain
D) two tissue layers
E) tube feet

E) tube feet

11) What is the best way to describe the brain of a sea anemone?
A) a thick ring around the mouth
B) a series of ganglia at the base of the tentacles
C) a pair of ganglia at the anterior end
D) a single ganglion in the body wall
E) nonexistent

E) nonexistent

12) Grasshoppers respire via
A) their skin.
B) nephridia.
C) book lungs.
D) spiracles and tracheae.
E) Malpighian tubules.

D) spiracles and tracheae.

13) The members of which class of the phylum Cnidaria occur only as polyps?
A) Hydrozoa
B) Scyphozoa
C) Anthozoa
D) Cubozoa
E) both B and D

C) Anthozoa

14) Which class of the phylum Cnidaria includes "jellies" with rounded (as opposed to box -like) medusae?
A) Hydrozoa
B) Scyphozoa
C) Anthozoa
D) Cubozoa
E) Both A and C are referred to as "jellies."

B) Scyphozoa

15) Corals are most closely related to which group?
A) jellies
B) freshwater hydras
C) sea anemones
D) sponges
E) barnacles

C) sea anemones

16) Which characteristic is shared by both cnidarians and flatworms?
A) dorsoventrally flattened bodies
B) flame cells
C) radial symmetry
D) a digestive system with a single opening
E) both A and D

D) a digestive system with a single opening

17) Generally, members of which flatworm class are nonparasitic?
A) Turbellaria
B) Trematoda
C) Cestoda
D) Monogenea
E) A, C, and D

A) Turbellaria

18) Nematodes are most closely related to
A) flatworms.
B) arthropods.
C) rotifers.
D) annelids.
E) chordates.

C) rotifers.

19) 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.

B) Reduce the freshwater snail population.

20) The larvae of many common tapeworms affecting humans are usually found
A) encysted in human muscle.
B) encysted in the muscle of an animal such as a cow or pig.
C) in the abdominal blood vessels of humans.
D) in the human brain.
E) in the intestines of cows and pigs.

B) encysted in the muscle of an animal such as a cow or pig.

1) 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 appe aring in his feces. Administration of niclosamide cured the problem. The student had probably been infected by a
A) pinworm.
B) hookworm.
C) nematode.
D) tapeworm.
E) proboscis worm.

D) tapeworm.

22) Which of the following combinations of phylum and description is incorrect?
A) Echinodermata-bilateral and radial symmetry, coelom from archenteron
B) Nematoda-roundworms, pseudocoelomate
C) Cnidaria-radial symmetry, polyp and medusa body forms
D) Platyhelminthes -flatworms, gastrovascular cavity, acoelomate
E) Porifera-gastrovascular cavity, coelom present

E) Porifera-gastrovascular cavity, coelom present

23) An organism is able to extend its feeding structure(s) through a hole in an exoskeleton. If the organism were an ectoproct, it would extend a ________; if a coral animal, it would extend ________; if a bivalve, i t would extend ________; and if a barnacle, it would extend ________.
A) stomach; a pharynx; a radula; mandibles
B) lophophore; trophi; a radula; jointed appendages
C) pharynx; a proboscis; trophi; mandibles
D) lophophore; tentacles; gill(s); jointed appendages
E) tentacle; a proboscis; gill(s); a pharynx

D) lophophore; tentacles; gill(s); jointed appendages

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

C) for feeding.

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

C) a lophophore.

26) While sampling marine plankton in a lab, a student encounters large numbers of fertilized eggs. She rears some of the eggs in the laboratory for further study and finds that the blastopore becomes the mouth. The embryo develops into a trochophore larva and eventually has a coelom. These eggs probably belonged to a(n)
A) annelid.
B) echinoderm.
C) mollusc.
D) nematode.
E) arthropod.

C) mollusc.

27) Which molluscan class includes members that undergo embryo nic torsion?
A) Polyplacophora
B) Bivalvia
C) Cephalopoda
D) Gastropoda
E) All molluscan classes have this characteristic.

D) Gastropoda

28) In a tide pool, a student encounters an organism with a hard outer covering that contains much calcium carbonate, 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 mantle
B) a heart
C) a body cavity
D) a lophophore
E) eyes

A) a mantle

29) A terrestrial mollusc without a shell belongs to which class?
A) Gastropoda
B) Polyplacophora
C) Bivalvia
D) Cephalopoda
E) Arthropoda

A) Gastropoda

30) Which molluscan class includes chitons?
A) Polyplacophora
B) Bivalvia
C) Cephalopoda
D) Gastropoda
E) both C and D

A) Polyplacophora

31) A radula is present in members of which class(es)?
A) Gastropoda
B) Polyplacophora
C) Bivalvia
D) A and B only
E) A, B, and C

D) A and B only
A) Gastropoda
B) Polyplacophora

32) While snorkeling, a student observes an active marine animal that has a series of muscular tentacles bearing suckers associated with its head. Segmentation is not observed, but a pair of large, well-developed eyes is evident. The student is observing an animal belonging t o which class?
A) Gastropoda
B) Cephalopoda
C) Polyplacophora
D) Polychaeta
E) Bivalvia

B) Cephalopoda

33) All of the following animal groups include terrestrial life forms except
A) Mollusca.
B) Crustacea.
C) Echinodermata.
D) Arthropoda.

C) Echinodermata.

34) have parapodia
Match the descriptions to the correct annelid class(es) from the list below. Each choice may b e used once, more than once, or not at all.
A.Oligochaeta
B.Polychaeta
C.Hirudinea
D.two of the above
E.all of the above

B.Polychaeta

35) many are parasites
Match the descriptions to the correct annelid class(es) from the list below. Each choice may b e used once, more than once, or not at all.
A.Oligochaeta
B.Polychaeta
C.Hirudinea
D.two of the above
E.all of the above

C.Hirudinea

36) have segmented bodies
Match the descriptions to the correct annelid class(es) from the list below. Each choice may b e used once, more than once, or not at all.
A.Oligochaeta
B.Polychaeta
C.Hirudinea
D.two of the above
E.all of the above

E.all of the above

37) make castings that are agriculturally important
Match the descriptions to the correct annelid class(es) from the list below. Each choice may b e used once, more than once, or not at all.
A.Oligochaeta
B.Polychaeta
C.Hirudinea
D.two of the above
E.all of the above

A.Oligochaeta

38) name indicates the relative number of bristles its members have
Match the descriptions to the correct annelid class(es) from the list below. Each choice may b e used once, more than once, or not at all.
A.Oligochaeta
B.Polychaeta
C.Hirudinea
D.two of the above
E.all of the above

D.two of the above

39) some members release an anticoagulate that is of medical significance
Match the descriptions to the correct annelid class(es) from the list below. Each choice may b e used once, more than once, or not at all.
A.Oligochaeta
B.Polychaeta
C.Hirudinea
D.two of the above
E.all of the above

C.Hirudinea

40) A stalked, sessile marine organism has several feathery feeding structures surrounding an opening through which food enters. The organism could potentially be a cnidarian, a lophophorate, a tube -dwelling worm, a crustacean, or an echinoderm. Finding which of the following in this organism would allow the greatest certainty of identification?
A) the presence of what seems to be radial symmetry
B) a hard covering made partly of calcium carbonate
C) a digestive system with mouth and anus separate from each other
D) a water vascular system
E) a nervous system

D) a water vascular system

41) Humans most frequently acquire trichinosis by
A) 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.

B) eating undercooked pork.

42) A terrestrial animal species is discovered with the following larval characteristics: exoskeleton, tracheal system for gas exchange, and modified segmentation. A knowledgeable zoologist would predict that its adults probably also would have
A) eight legs.
B) two pairs of antennae.
C) a sessile lifestyle.
D) an open circulatory system.
E) parapodia.

D) an open circulatory system

43) What is true of 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.

D) Only A and B are true.
A) They have an endoskeleton of hard calcareous plates.
B) Tube feet provide motility in most species.

44) A student observes a worm-like organism crawling about on dead organic matter. Later, the organism sheds its outer covering. One possibility is that the organism is a larval insect (like a maggot). On the other hand, it might be a member of the phylum ________. One way to distinguish between the two possibilities is by looking for 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.

D) Nematoda; a circulatory system.

45) The heartworms that can accumulate within the heart of dogs and other mammals have a pseudocoelom, an alimentary canal, and an outer covering that is occasionally shed. To which phylum does the heartworm belong?
A) Platyhelminthes
B) Arthropoda
C) Nematoda
D) Phoronida
E) Annelida

C) Nematoda

46) Infection with which parasite would cause elasticity in human skeletal muscles?
A) trichinella worms
B) tapeworms
C) copepods
D) blood flukes
E) rotifers

A) trichinella worms

47) Skeletal structures that are entirely or partly composed of calcium carbonate can be found in some members of the follo wing except
A) sponges.
B) coral animals.
C) molluscs.
D) arthropods.
E) nematodes

E) nematodes

48) What distinguishes complete metamorphosis from incomplete metamorphosis in insects?
A) presence of wings in the adult, but not in earlier life stages
B) presence of sex organs in the adult, but not in earlier life stages
C) radically different appearance between adults and earlier life stages
D) only A and B
E) A, B, and C

C) radically different appearance between adults and earlier life stages

49) Which of the following is a characteristic of adult echinoderms?
A) secondary radial symmetry
B) spiral cleavage during early embryonic development
C) gastrovascular cavity
D) exoskeleton
E) a lophophore

A) secondary radial symmetry

50) Among the invertebrates, arthropods are unique in possessing
A) a cuticle.
B) a ventral nerve cord.
C) open circulation.
D) wings.
E) segmented bodies.

D) wings.

51) The presence or absence of mandibles can be used to distinguish between
A) insects and centipedes.
B) insects and crustaceans.
C) insects and millipedes.
D) insects and spiders.
E) centipedes and millipedes

D) insects and spiders.

52) A shared derived characteristic for members of the arthropod subgroup that includes spiders would be the presence of
A) chelicerae.
B) an open circulatory system.
C) an exoskeleton.
D) a cuticle.
E) a cephalothorax.

A) chelicerae.

53) You find a small animal with eight legs crawling up your bedroom wall. Closer examination will probably reveal that this animal has
A) antennae.
B) no antennae.
C) chelicerae.
D) A and C
E) B and C

E) B and C
B) no antennae.
C) chelicerae.

54) While working in your garden, you discover a worm-like, segmented animal with two pairs of jointed legs per segment. The animal is probably a
A) millipede.
B) caterpillar.
C) centipede.
D) polychaete worm.
E) sow bug.

A) millipede.

55) Which of the following characteristics most likely explains why insects are so successful at dispersing to distant environments?
A) hemocoel
B) wings
C) jointed appendages
D) chewing mandibles
E) internal fertilization

B) wings

56) They can extend the stomach through their mouth to feed.
Match the descriptions with the correct echinoderm class from the list below. Each choice may be used once, more than once, or not at all.
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)

B. class Asteroidea (sea stars)

57) They have distinct central disks and long, flexible arms.
Match the descriptions with the correct echinoderm class from the list below. Each choice may be used once, more than once, or not at all.
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)

C. class Ophiuroidea (brittle stars)

58) They are elongated in the oral-aboral axis.
Match the descriptions with the correct echinoderm class from the list below. Each choice may be used once, more than once, or not at all.
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)

E. class Holothuroidea (sea cucumbers)

59) Their mouth is directed upward.
Match the descriptions with the correct echinoderm class from the list below. Each choice may be used once, more than once, or not at all.
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)

A. class Crinoidea (sea lilies and feather stars)

60) They can have long, movable spines.
Match the descriptions with the correct echinoderm class from the list below. Each choice may be used once, more than once, or not at all.
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)

D. class Echinoidea (sea urchins and sand dollars)

61) protostomes that have an open circulatory system and an exoskeleton of chitin
For the following questions, match the descriptions with the correct phylum below. Each choice may be used once, more than once, or not at all.
A.Cnidaria
B.Annelida
C.Mollusca
D.Arthropoda
E.Echinodermata

D.Arthropoda

62) protostomes with a unique drape of tissue that may secrete a shell
For the following questions, match the descriptions with the correct phylum below. Each choice may be used once, more than once, or not at all.
A.Cnidaria
B.Annelida
C.Mollusca
D.Arthropoda
E.Echinodermata

C.Mollusca

63) a diploblastic phylum of aquatic predators
For the following questions, match the descriptions with the correct phylum below. Each choice may be used once, more than once, or not at all.
A.Cnidaria
B.Annelida
C.Mollusca
D.Arthropoda
E.Echinodermata

A.Cnidaria

64) deuterostomes that have an endoskeleton
For the following questions, match the descriptions with the correct phylum below. Each choice may be used once, more than once, or not at all.
A.Cnidaria
B.Annelida
C.Mollusca
D.Arthropoda
E.Echinodermata

E.Echinodermata

65) protostomes that have a closed circulatory system and obvious segmentation
For the following questions, match the descriptions with the correct phylum below. Each choice may be used once, more than once, or not at all.
A.Cnidaria
B.Annelida
C.Mollusca
D.Arthropoda
E.Echinodermata

B.Annelida

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