Question 1

Anemones have no:

Accepted Answer

A)  endoderm.
B)  mesoderm.
C)  ectoderm.D) All of the above
E) B) and C)

Question 2

The common ancestor of sponges and other animals was probably:

Accepted Answer

A)  unicellular.
B)  multicellular without tissues.
C)  multicellular with tissues but without organ systems.
D)  multicellular with tissues and a few organ systems.
E)  multicellular with tissues and many organ systems.F) All of the above
G) A) and E)

Question 3

How does the skeletal system of an arachnid differ from that of a cephalopod?

Accepted Answer

Arachnids have an exoskeleton ...

Question 4

Charles Darwin wrote that members of the phylum ________ are particularly important for agriculture because they mix and aerate soil.

Accepted Answer

A)  Cnidaria
B)  Platyhelminthes
C)  Annelida
D)  Arthropoda
E)  NematodaF) A) and E)
G) None of the above

Question 5

Chordates and echinoderms are both protostomes. True or False?

Accepted Answer

A) True 
 B)False

Question 6

What characterizes a free-living flatworm?

Accepted Answer

A)  tubular gut
B)  hooks
C)  cuticle
D)  eyespots
E)  coelomF) A) and D)
G) All of the above

Question 7

________ are characterized by having a pseudocoelom.

Accepted Answer

A)  Roundworms
B)  Annelids
C)  Arthropods
D)  Chordates
E)  CnidariansF) A) and D)
G) D) and E)

Question 8

All animals with tissues have:

Accepted Answer

A)  symmetrical bodies.
B)  bilateral symmetry.
C)  radial symmetry.
D)  two germ layers.
E)  three germ layers.F) B) and D)
G) B) and C)

Question 9

The skin and nervous tissues develop from which germ layer?

Accepted Answer

A)  ectoderm
B)  endoderm
C)  mesoderm
D)  mesoglea
E)  protoplasmF) B) and D)
G) B) and E)

Question 10

Which cnidarian is the basis of an undersea habitat?

Accepted Answer

A)  sea cucumber
B)  hydra
C)  anemone
D)  jellyfish
E)  coralF) A) and B)
G) None of the above

Question 11

The low energy demands of nematodes allow them to survive without a:

Accepted Answer

A)  reproductive system.
B)  tubular gut.
C)  body cavity.
D)  skeleton.
E)  respiratory system.F) A) and B)
G) A) and C)

Question 12

Animals that have distinct right and left sides display ________ symmetry.

Accepted Answer

The answer of Animals that have distinct right and left...

Question 13

The ________ is the embryonic germ layer that develops into nervous tissue.

Accepted Answer

The answer of The ________ is the embryonic germ layer...

Question 14

Ecdysozoans:

Accepted Answer

A)  have trochophore larva.
B)  include mollusks, annelids, and flatworms.
C)  have a special feeding structure.
D)  have a body cavity that forms from the digestive system.
E)  periodically shed their outer body covering.F) C) and E)
G) A) and C)

Question 15

A jointed exoskeleton is a characteristic of ________.

Accepted Answer

The answer of A jointed exoskeleton is a characteristic of...

Question 16

Your job is to classify a newly discovered animal species. Your initial studies reveal that your specimen has tissues, organs, a head, and a coelom; has no segmentation; and has bilateral symmetry. To what phylum does this animal belong?

Accepted Answer

A)  Cnidaria
B)  Mollusca
C)  Annelida
D)  Platyhelminthes
E)  PoriferaF) All of the above
G) B) and D)

Question 17

Which of the following animal phyla is distinguished by a lack of tissues?

Accepted Answer

A)  echinoderms
B)  flatworms
C)  annelids
D)  roundworms
E)  spongesF) A) and D)
G) B) and C)

Question 18

A cnidarian that builds a calcium carbonate skeleton is a(n) :

Accepted Answer

A)  oyster.
B)  clam.
C)  snail.
D)  coral.
E)  crab.F) A) and B)
G) B) and E)

Question 19

A clam is a(n) :

Accepted Answer

A)  arthropod.
B)  mollusk.
C)  chordate.
D)  echinoderm.
E)  arachnid.F) D) and E)
G) C) and D)

Question 20

The Trichinella worm, which causes trichinosis, is a(n)________.

Accepted Answer

The answer of The Trichinella worm, which causes trichinosis, is...

Exam 23: Animal Diversity I: Invertebrates

Charles Darwin wrote that members of the phylum ________ are particularly important for agriculture because they mix and aerate soil.

Correct AnswerverifiedShow Answer

Which cnidarian is the basis of an undersea habitat?

Correct AnswerverifiedShow Answer

Anemones have no:

Correct AnswerverifiedShow Answer

A cnidarian that builds a calcium carbonate skeleton is a(n) :

Correct AnswerverifiedShow Answer

Ecdysozoans:

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Animals that have distinct right and left sides display ________ symmetry.

Correct AnswerverifiedShow Answer

A jointed exoskeleton is a characteristic of ________.

Correct AnswerverifiedShow Answer

Your job is to classify a newly discovered animal species. Your initial studies reveal that your specimen has tissues, organs, a head, and a coelom; has no segmentation; and has bilateral symmetry. To what phylum does this animal belong?

Correct AnswerverifiedShow Answer

The common ancestor of sponges and other animals was probably:

Correct AnswerverifiedShow Answer

________ are characterized by having a pseudocoelom.

Correct AnswerverifiedShow Answer

Which of the following animal phyla is distinguished by a lack of tissues?

Correct AnswerverifiedShow Answer

The ________ is the embryonic germ layer that develops into nervous tissue.

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What characterizes a free-living flatworm?

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The skin and nervous tissues develop from which germ layer?

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All animals with tissues have:

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Chordates and echinoderms are both protostomes. True or False?

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How does the skeletal system of an arachnid differ from that of a cephalopod?

Correct AnswerverifiedArachnids have an exoskeleton ...View AnswerShow Answer

A clam is a(n) :

Correct AnswerverifiedShow Answer

The Trichinella worm, which causes trichinosis, is a(n)________.

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The low energy demands of nematodes allow them to survive without a:

Correct AnswerverifiedShow Answer

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Arachnids have an exoskeleton ...
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