Question 1

Why are developmental biologists so interested in studying echinoderm embryos?

Accepted Answer

A)   Echinoderms are primitive chordates.
B)   Echinoderms are the closest living relatives of chordates.
C)   Echinoderms are the only animals with three embryonic germ layers.
D)   Echinoderms, unlike most invertebrates, retain their notochords as adults.
E)   Echinoderms, like chordates, are protostomes.F) A) and B)
G) All of the above

Question 2

Which of these has a coelom?

Accepted Answer

A)   sea star
B)   roundworm
C)   fluke
D)   planarian
E)   hydraF) A) and B)
G) C) and E)

Question 3

Which feature is not found in the arthropods?

Accepted Answer

A)   segmentation
B)   exoskeleton
C)   jointed appendages
D)   well developed nervous system
E)   pseudocoelom lined with mesoderF) A) and E)
G) A) and C) E

Question 4

Which of these is mismatched?

Accepted Answer

A)   cnidarian-nematocyst
B)   planarian-ladderlike nervous system
C)   sponge-collar cell
D)   fluke-body cavity
E)   roundworm-complete digestive tractF) A) and B)
G) C) and D)

Question 5

An endoparasitic acoelomate with a body consisting of a scolex and a series of proglottids is a

Accepted Answer

A)   fluke.
B)   roundworm.
C)   tapeworm.
D)   hydra.
E)   sponge.F) A) and E)
G) D) and E)

Question 6

Which of these is a bivalve?

Accepted Answer

A)   clam
B)   octopus
C)   snail
D)   squid
E)   conchF) A) and B)
G) C) and D)

Question 7

The main reason reptiles are so well-adapted to land environment is their method of

Accepted Answer

A)   respiration.
B)   vocalization.
C)   reproduction.
D)   predation.
E)   temperature regulation.F) C) and D)
G) All of the above

Question 8

Which of these is a cephalopod?

Accepted Answer

A)   nudibranch
B)   snail
C)   oyster
D)   squid
E)   musselF) A) and D)
G) A) and B)

Question 9

Which of these has the necessary adaptations to survive in a dry land environment?

Accepted Answer

A)   insect
B)   lobe-finned fish
C)   amphibian
D)   planarian
E)   tunicateF) A) and B)
G) A) and C) A

Question 10

What is a common feature shared by both the roundworms and the arthropods?

Accepted Answer

A)   gills
B)   cutaneous respiration
C)   exoskeleton
D)   endoskeleton
E)   jointed appendagesF) D) and E)
G) C) and D)

Question 11

In protostome development,

Accepted Answer

A)   the blastopore becomes the anus.
B)   the coelom forms from mesodermal outpocketings of the gut.
C)   there is no coelom.
D)   the mouth forms from the second embryonic opening, not from the blastopore.
E)   the blastopore becomes the mouth.F) A) and E)
G) None of the above

Question 12

Which feature is lacking in sponges?

Accepted Answer

A)   multicellularity
B)   cellular level of organization
C)   contain organized true tissues
D)   flagella
E)   filter feederF) A) and D)
G) B) and D)

Question 13

A leech would not have

Accepted Answer

A)   a notochord.
B)   segmentation.
C)   a ventral nerve cord.
D)   a coelom.
E)   mesoderm.F) A) and B)
G) A) and C)

Question 14

Which of these statements about the evolutionary tree of animals is incorrect?

Accepted Answer

A)   All animals have true tissues.
B)   All animals are multicellular.
C)   Humans are more closely related to sea stars than to insects.
D)   Radial symmetry preceded bilateral symmetry in animal evolution.
E)   Some animals have no germ layers, while others have two or three germ layers.F) All of the above
G) A) and D)

Question 15

Amphibians are the descendants of

Accepted Answer

A)   ray-finned fishes.
B)   cartilaginous fishes.
C)   lobe-finned fishes.
D)   hagfishes.
E)   reptiles.F) All of the above
G) B) and D)

Question 16

Which are invertebrate chordates?

Accepted Answer

A)   tunicates only
B)   lancelets only
C)   jawless fishes only
D)   tunicates and lancelets but not jawless fishes
E)   tunicates, lancelets, and jawless fishesF) None of the above
G) A) and D)

Question 17

What are the key features of chordates?

Accepted Answer

A)   notochord, dorsal tubular nerve cord, pharyngeal pouches and a tail
B)   notochord, dorsal tubular nerve cord, water vascular system and a tail
C)   ventral nerve chord, notochord, pharyngeal pouches and a tail
D)   notochord, dorsal tubular nerve cord, nerve ring and a tail
E)   notochord, ventral nerve cord, water vascular system and a tailF) D) and E)
G) B) and C)

Question 18

Which feature is necessary in order to classify an organism as an ecdysozoan?

Accepted Answer

A)   nonliving exoskeleton
B)   endoskeleton made of chitin
C)   closed circulatory system
D)   open circulatory system
E)   gillsF) B) and E)
G) None of the above

Question 19

Which of these is a protostome?

Accepted Answer

A)   a chimpanzee
B)   a planarian
C)   a sea anemone
D)   a sea star
E)   lanceletF) A) and B)
G) All of the above B

Question 20

Which is an example of a parazoa?

Accepted Answer

A)   sponges
B)   cnidarians
C)   flatworms
D)   annelids
E)   echinodermsF) B) and E)
G) C) and D)

Exam 19: Both Water and Land: Animals

Why are developmental biologists so interested in studying echinoderm embryos?

Correct AnswerverifiedShow Answer

Which of these has a coelom?

Correct AnswerverifiedShow Answer

Which feature is not found in the arthropods?

Correct AnswerverifiedE

Which of these is mismatched?

Correct AnswerverifiedShow Answer

An endoparasitic acoelomate with a body consisting of a scolex and a series of proglottids is a

Correct AnswerverifiedShow Answer

Which of these is a bivalve?

Correct AnswerverifiedShow Answer

The main reason reptiles are so well-adapted to land environment is their method of

Correct AnswerverifiedShow Answer

Which of these is a cephalopod?

Correct AnswerverifiedShow Answer

Which of these has the necessary adaptations to survive in a dry land environment?

Correct AnswerverifiedA

What is a common feature shared by both the roundworms and the arthropods?

Correct AnswerverifiedShow Answer

In protostome development,

Correct AnswerverifiedShow Answer

Which feature is lacking in sponges?

Correct AnswerverifiedShow Answer

A leech would not have

Correct AnswerverifiedShow Answer

Which of these statements about the evolutionary tree of animals is incorrect?

Correct AnswerverifiedShow Answer

Amphibians are the descendants of

Correct AnswerverifiedShow Answer

Which are invertebrate chordates?

Correct AnswerverifiedShow Answer

What are the key features of chordates?

Correct AnswerverifiedShow Answer

Which feature is necessary in order to classify an organism as an ecdysozoan?

Correct AnswerverifiedShow Answer

Which of these is a protostome?

Correct AnswerverifiedB

Which is an example of a parazoa?

Correct AnswerverifiedShow Answer

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E

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A

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B

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