Question 1

Air passage into the trachea of most insects is controlled by the closing and opening of valves, which operate special openings called

Accepted Answer

A)  spiracles.
B)  ocelli.
C)  ommatidia.
D)  book lungs.E) A) and D)
F) B) and D)

Question 2

Trochophores, the free-swimming larvae of many mollusks, are propelled through the water by

Accepted Answer

A)  flagella.
B)  cilia.
C)  flame cells.
D)  nephridia.E) A) and B)
F) None of the above

Question 3

A _________ is a circular or U-shaped ridge around the mouth, bearing either one or two rows of ciliated, hollow tentacles.

Accepted Answer

Lophophore...

Question 4

If a hiker picked up a mollusk on a trail in a rain forest, what class would it belong to?

Accepted Answer

A)  Gastropoda
B)  Polyplacophora
C)  Bivalvia
D)  CephalopodaE) B) and D)
F) None of the above

Question 5

Turbellarian flatworms have a distinct head.When compared to the head of an insect, what is the flatworm head missing? rev: 05_14_2014_QC_49568

Accepted Answer

A)  Sensory organs
B)  Light sensitive structures
C)  Anterior collection of nerve cells
D)  A mouthE) All of the above
F) A) and B) D

Question 6

What change would result for a land snail that had a mutation interfering with chitin formation?

Accepted Answer

A)  It would have a soft, demineralized shell.
B)  It would have difficulty feeding.
C)  It could not form its exoskeleton.
D)  Molting would not be possible.E) C) and D)
F) None of the above B

Question 7

Barnacles are sessile filter feeders but unlike bivalves they have internal fertilization.How do they solve this problem?

Accepted Answer

A)  The filter sperm from the water column.
B)  They get fertilized during free living larval stages.
C)  They are only capable of asexual reproduction.
D)  They are hemaphrodites with especially long penises.E) A) and B)
F) A) and C)

Question 8

The sexual reproduction of earthworms characteristically is

Accepted Answer

A)  hermaphroditic but cross-fertilizing.
B)  hermaphroditic but self-fertilizing.
C)  normal type between individuals who remain as males and females throughout their life time.
D)  normal appearing, but individuals change sex periodically.E) B) and C)
F) C) and D)

Question 9

How could a paleontologist distinguish between a bryozoan fossil and a brachiopod fossil?

Accepted Answer

A)  Bryozoans are large and solitary.
B)  Zoecia are always found in aggregates.
C)  You can only distinguish the two by examining the lophophore.
D)  Bryozoans often look like bivalves.E) A) and B)
F) A) and C)

Question 10

How does a ribbon worm differ from a flatworm?

Accepted Answer

A)  A flatworm has a complete digestive system.
B)  A ribbon worm has a mouth and an anus.
C)  Flatworms are deuterostomes.
D)  Flatworms are radially symmetrical and ribbon worms are bilaterally symmetrical.E) A) and C)
F) None of the above

Question 11

The phyla Bryozoa and Brachiopoda have which feature in common?

Accepted Answer

A)  nephridia
B)  a lophophore
C)  a radula
D)  setaeE) A) and D)
F) C) and D) B

Question 12

Compound eyes are composed of independent visual units called

Accepted Answer

A)  apposition segments.
B)  ocelli.
C)  ommatidia.
D)  retinas.E) A) and C)
F) A) and B)

Question 13

In many arthropods, body segments have become fused into functional groups called _____.

Accepted Answer

The answer of In many arthropods, body segments have become...

Question 14

Select the mismatched pair of Phylum Mollusca classes and their examples.

Accepted Answer

A)  Polyplacophora-chitons
B)  Gastropoda-slugs
C)  Bivalvia-snails
D)  Cephalopoda-nautilusE) None of the above
F) A) and D)

Question 15

What would result if a leech had a mutation causing it to secrete low levels of anticoagulants?

Accepted Answer

A)  The pain of the leech bite would cause the leech to be detected.
B)  The leech would have a hard time locating appropriate hosts.
C)  The blood would stop flowing after a short time.
D)  The leech would have a hard time remaining attached to its host.E) A) and D)
F) B) and C)

Question 16

In arthropods, locomotion is accomplished by muscles that work against

Accepted Answer

A)  each other.
B)  the exoskeleton.
C)  a hydrostatic skeleton.
D)  mineralized bones.E) B) and D)
F) All of the above

Question 17

What is a simple way for determining if an annelid is a polychaete or a clitellate?

Accepted Answer

A)  The number of segments
B)  Possession of a closed circulatory system
C)  The amount of chaetae (setae) 
D)  The layout of the digestive systemE) A) and C)
F) A) and D)

Question 18

Paramecia use cilia for locomotion and for gathering organic matter.How are rotifers similar?

Accepted Answer

A)  Rotifers are single-celled protists
B)  The corona is made of cilia, and used for swimming and feeding.
C)  Rotifers and ciliates are thought to have given rise to all other animal phyla.
D)  Both lack a gut.E) None of the above
F) A) and B)

Question 19

The lophophore of a brachiopod serves the same function as the __________ in a bivalve.

Accepted Answer

A)  Mantle
B)  Foot
C)  Shell
D)  GillsE) All of the above
F) A) and B)

Question 20

Decapod crustaceans (shrimps, lobsters, and crabs)  all lack

Accepted Answer

A)  a carapace, a dorsal cephalothorax shield.
B)  a ventral line of appendages, swimmerets.
C)  a tail spine, telson.
D)  chelicerae.E) B) and C)
F) A) and B)

Exam 34: Protostomes

Air passage into the trachea of most insects is controlled by the closing and opening of valves, which operate special openings called

Correct AnswerverifiedShow Answer

Trochophores, the free-swimming larvae of many mollusks, are propelled through the water by

Correct AnswerverifiedShow Answer

A _________ is a circular or U-shaped ridge around the mouth, bearing either one or two rows of ciliated, hollow tentacles.

Correct AnswerverifiedLophophore...View AnswerShow Answer

If a hiker picked up a mollusk on a trail in a rain forest, what class would it belong to?

Correct AnswerverifiedShow Answer

Turbellarian flatworms have a distinct head.When compared to the head of an insect, what is the flatworm head missing? rev: 05_14_2014_QC_49568

Correct AnswerverifiedD

What change would result for a land snail that had a mutation interfering with chitin formation?

Correct AnswerverifiedB

Barnacles are sessile filter feeders but unlike bivalves they have internal fertilization.How do they solve this problem?

Correct AnswerverifiedShow Answer

The sexual reproduction of earthworms characteristically is

Correct AnswerverifiedShow Answer

How could a paleontologist distinguish between a bryozoan fossil and a brachiopod fossil?

Correct AnswerverifiedShow Answer

How does a ribbon worm differ from a flatworm?

Correct AnswerverifiedShow Answer

The phyla Bryozoa and Brachiopoda have which feature in common?

Correct AnswerverifiedB

Compound eyes are composed of independent visual units called

Correct AnswerverifiedShow Answer

In many arthropods, body segments have become fused into functional groups called _____.

Correct AnswerverifiedShow Answer

Select the mismatched pair of Phylum Mollusca classes and their examples.

Correct AnswerverifiedShow Answer

What would result if a leech had a mutation causing it to secrete low levels of anticoagulants?

Correct AnswerverifiedShow Answer

In arthropods, locomotion is accomplished by muscles that work against

Correct AnswerverifiedShow Answer

What is a simple way for determining if an annelid is a polychaete or a clitellate?

Correct AnswerverifiedShow Answer

Paramecia use cilia for locomotion and for gathering organic matter.How are rotifers similar?

Correct AnswerverifiedShow Answer

The lophophore of a brachiopod serves the same function as the __________ in a bivalve.

Correct AnswerverifiedShow Answer

Decapod crustaceans (shrimps, lobsters, and crabs) all lack

Correct AnswerverifiedShow Answer

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Lophophore...
View Answer

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B

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B

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