Question 1

How would an earthworm stretch its body to reach a patch of dirt after crossing a hot sidewalk?

Accepted Answer

A)  Contraction of the circular muscles
B)  Contraction of the longitudinal muscles
C)  Relaxing the chaetae (setae) 
D)  Pulling on the chaetae (setae) E) A) and D)
F) B) and C)

Question 2

Squids and octopuses move by means of water movement through their

Accepted Answer

A)  tentacles.
B)  cilia and flagella.
C)  modified mantle cavity.
D)  muscular foot.E) A) and B)
F) A) and C)

Question 3

Which of the following organs of cephalopods resemble those of the vertebrates?

Accepted Answer

A)  arms
B)  nephridia
C)  eyes
D)  digestive tissuesE) B) and C)
F) A) and D)

Question 4

The phylum that includes snails, clams, oysters, and octopuses is the

Accepted Answer

A)  Ectoprocta.
B)  Brachiopoda.
C)  Mollusca.
D)  Annelida.E) All of the above
F) A) and C)

Question 5

Chelicerae function as

Accepted Answer

A)  eyes.
B)  fangs or pincers.
C)  jaws or mandibles.
D)  teeth.E) C) and D)
F) None of the above

Question 6

The passage of an arthropod through stages from egg to adult is

Accepted Answer

A)  differentiation.
B)  evolution.
C)  graduation.
D)  metamorphosis.E) All of the above
F) C) and D)

Question 7

Brachiopods develop as protostomes, but they show ______ cleavage.

Accepted Answer

The answer of Brachiopods develop as protostomes, but they show...

Question 8

Why doesn't a tapeworm have a mouth on its scolex?

Accepted Answer

A)  The mouth is on the proglottids
B)  Endoparasites don't need a mouth
C)  The mouth is located at the end of the pharynx
D)  Tapeworms use a radula instead of a mouth to feedE) A) and B)
F) A) and C)

Question 9

In their basic body plan, mollusks have a visceral mass covered with a soft epithelium and a muscular ____ that is used in locomotion.

Accepted Answer

The answer of In their basic body plan, mollusks have...

Question 10

Which feature is an evolutionary novelty of hexapods?

Accepted Answer

A)  Jointed appendages
B)  Mandibles
C)  Chitinous exoskeletons
D)  WingsE) B) and D)
F) A) and B)

Question 11

The medicinal leech, once used to withdraw "unhealthy" blood from patients, produces ____________ to ensure blood flow from the host?

Accepted Answer

A)  antibiotics
B)  antibodies
C)  anticoagulants
D)  blood clotsE) C) and D)
F) A) and C)

Question 12

Radula modification allowed all of the following functions in gastropods except

Accepted Answer

A)  scraping algae off rocks.
B)  eating vegetation.
C)  boring holes in other mollusk shells.
D)  protecting themselves with nematocysts.E) B) and D)
F) All of the above

Question 13

Which one of the following statements about the phylum Brachiopoda is false?

Accepted Answer

A)  Brachiopods are often misidentified as bivalves.
B)  Brachiopods were much more diverse in the past.
C)  As in bivalves, the valves in brachiopods are lateral (left and right)  to the body axis.
D)  Most brachiopods are sessile (attached) .E) None of the above
F) C) and D)

Question 14

Earthworms show all of the following features except

Accepted Answer

A)  containing segments with a mouth on the first and the anus on the last.
B)  containing touch-sensitive and light-sensitive organs in the segments.
C)  containing fewer setae than in polychaetes.
D)  containing distinct head regions and parapodia.E) A) and C)
F) All of the above

Question 15

The excretory structures of terrestrial arthropods are slender projections from the digestive tract that are attached at the junction of the midgut and hindgut.These are called

Accepted Answer

A)  flame cells.
B)  kidneys and bladders.
C)  Malpighian tubules.
D)  nephridia.E) A) and B)
F) A) and D)

Question 16

Nauplius, a unique kind of larva, is characteristic of

Accepted Answer

A)  mites.
B)  crustaceans.
C)  horseshoe crabs.
D)  insects.E) B) and C)
F) None of the above

Question 17

The rasping tongue, the radula, is present in which molluscan group?

Accepted Answer

A)  bivalve
B)  oyster
C)  clam
D)  snailE) A) and B)
F) A) and C)

Question 18

In some arthropods tagmatization has produced a combination of head and thorax known as a

Accepted Answer

A)  cephalothorax.
B)  fused corpora.
C)  headless mite.
D)  larval instar.E) C) and D)
F) None of the above

Question 19

The partitions that separate the segments of the annelid body are known as

Accepted Answer

A)  pseudocoels.
B)  nephridia.
C)  setae.
D)  septa.E) B) and C)
F) A) and D)

Question 20

Which one of the following incorrectly matches a molluscan structure with its typical function?

Accepted Answer

A)  ctenidia-secretion of the shell (when present) 
B)  visceral mass-houses organs of digestion, excretion, reproduction
C)  foot-locomotion
D)  nephrostome-collection of nitrogenous wastesE) A) and B)
F) All of the above

Exam 34: Protostomes

In some arthropods tagmatization has produced a combination of head and thorax known as a

Correct AnswerverifiedShow Answer

Why doesn't a tapeworm have a mouth on its scolex?

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The phylum that includes snails, clams, oysters, and octopuses is the

Correct AnswerverifiedShow Answer

The medicinal leech, once used to withdraw "unhealthy" blood from patients, produces ____________ to ensure blood flow from the host?

Correct AnswerverifiedShow Answer

Which one of the following incorrectly matches a molluscan structure with its typical function?

Correct AnswerverifiedShow Answer

Brachiopods develop as protostomes, but they show ______ cleavage.

Correct AnswerverifiedShow Answer

Squids and octopuses move by means of water movement through their

Correct AnswerverifiedShow Answer

Radula modification allowed all of the following functions in gastropods except

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Chelicerae function as

Correct AnswerverifiedShow Answer

Which one of the following statements about the phylum Brachiopoda is false?

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Which of the following organs of cephalopods resemble those of the vertebrates?

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The partitions that separate the segments of the annelid body are known as

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Which feature is an evolutionary novelty of hexapods?

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The passage of an arthropod through stages from egg to adult is

Correct AnswerverifiedShow Answer

How would an earthworm stretch its body to reach a patch of dirt after crossing a hot sidewalk?

Correct AnswerverifiedShow Answer

In their basic body plan, mollusks have a visceral mass covered with a soft epithelium and a muscular ____ that is used in locomotion.

Correct AnswerverifiedShow Answer

The excretory structures of terrestrial arthropods are slender projections from the digestive tract that are attached at the junction of the midgut and hindgut.These are called

Correct AnswerverifiedShow Answer

Earthworms show all of the following features except

Correct AnswerverifiedShow Answer

Nauplius, a unique kind of larva, is characteristic of

Correct AnswerverifiedShow Answer

The rasping tongue, the radula, is present in which molluscan group?

Correct AnswerverifiedShow Answer

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