Question 1

Segmentation in arthropods differs from that of annelids because arthropod segments are:

Accepted Answer

A)   smaller.
B)   superficial.
C)   more specialized.
D)   only present in adults.
E)   only present in larvae.

Question 2

What specialized structure do crustaceans use to sense gravity?

Accepted Answer

A)   antennae
B)   maxillae
C)   mandibles
D)   statocysts
E)   swimmerets

Question 3

Figure 31-6  The cross section in the accompanying figure is representative of the internal structures found in:

Accepted Answer

A)   phoronids.
B)   nemerteans.
C)   gastropods.
D)   flatworms.
E)   oligochaetes.

Question 4

What is the purpose of protonephridia in flatworms?

Accepted Answer

A)   To sense prey
B)   To exchange gas
C)   To respond to stimuli
D)   To regulate fluid balance
E)   To serve as a structure for sexual reproduction

Question 5

Which is a characteristic of all annelids?

Accepted Answer

A)   They have a visceral mass.
B)   They have a segmented body.
C)   They move with a muscular foot.
D)   They surround their body with a mantle.
E)   They have an open circulatory system.

Question 6

Which of the following terms is associated with polychaetes?

Accepted Answer

A)   radula
B)   mantle
C)   parapodia
D)   visceral mass
E)   metamorphosis

Question 7

Members of phylum Ctenophora are diploblastic but lack cnidocytes. 
____________________

Accepted Answer

A) True 
 B)False

Question 8

The intermediate host for a blood fluke is a:

Accepted Answer

A)   human.
B)   cow.
C)   dog.
D)   cat.
E)   snail.

Question 9

Which of the following is an adaptation that enables cephalopods to escape from their predators?

Accepted Answer

A)   torsion
B)   a hard shell
C)   a modified radula
D)   rapidly changing colors
E)   poisonous salivary secretions

Question 10

Hermaphroditic earthworms reproduce sexually by connecting their bodies by their ____. This allows transfer of ____ from one worm to the other.

Accepted Answer

A)   setae; zygotes
B)   setae; eggs
C)   setae; sperm
D)   clitellum; eggs
E)   clitellum; sperm

Question 11

Figure 31-5  Refer to the accompanying figure. What is the function of the structure labeled as 8?

Accepted Answer

A)   digestion
B)   respiration
C)   circulation
D)   movement
E)   reproduction

Question 12

In scyphozoans, the ____ is the dominant body form.

Accepted Answer

A)   polyp
B)   hydra
C)   medusa
D)   larvae
E)   juvenile

Question 13

The veliger larval form is unique to:

Accepted Answer

A)   insects.
B)   annelids.
C)   molluscs.
D)   arthropods.
E)   crustaceans.

Question 14

The phylum name Arthropoda refers to:

Accepted Answer

A)   the ability to fly.
B)   a hard exoskeleton.
C)   jointed appendages.
D)   a segmented coelom.
E)   respiratory capabilities.

Question 15

Figure 31-5  Refer to the accompanying figure. What is the structure labeled as 9?

Accepted Answer

A)   foot
B)   gills
C)   heart
D)   siphons
E)   digestive tract

Question 16

Figure 31-1  Refer to the accompanying figure. What is the structure labeled as 9?

Accepted Answer

A)   medusa
B)   planula
C)   miracidium
D)   feeding polyp
E)   polyp colony

Question 17

Which statement best describes a lophophore?

Accepted Answer

A)   It is a ciliated ring of tentacles surrounding the mouth.
B)   It is a structure used for locomotion in the Lophophorata.
C)   It is the opening also referred to as the anus in the Ecdysozoa.
D)   It is a larval stage found in the Lophotrochozoa and the Ecdysozoa.
E)   It is one of the openings to the excretory system of phylum Platyhelminthes.

Question 18

Identify the distinguishing characteristics of phylum Cnidaria. Then outline the classes within this phylum and their major characteristics. Include at least one representative for each class.

Accepted Answer

Members of phylum Cnidaria are character...

Question 19

What term describes how most sponges can produce both male and female gametes?

Accepted Answer

A)   asexual
B)   hermaphroditic
C)   indeterminate
D)   heterozygous
E)   enterocoelous

Question 20

Figure 31-1  Refer to the accompanying figure. Asexual reproduction is occurring at which point?

Accepted Answer

A)   1
B)   3
C)   4
D)   7
E)   9

Exam 31: Sponges, Cnidarians, Ctenophores, and Protostomes

Segmentation in arthropods differs from that of annelids because arthropod segments are:

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The phylum name Arthropoda refers to:

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What term describes how most sponges can produce both male and female gametes?

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The intermediate host for a blood fluke is a:

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Figure 31-5 Refer to the accompanying figure. What is the function of the structure labeled as 8?

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The veliger larval form is unique to:

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What is the purpose of protonephridia in flatworms?

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Which of the following is an adaptation that enables cephalopods to escape from their predators?

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Which is a characteristic of all annelids?

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Figure 31-1 Refer to the accompanying figure. What is the structure labeled as 9?

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Which statement best describes a lophophore?

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What specialized structure do crustaceans use to sense gravity?

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Which of the following terms is associated with polychaetes?

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Figure 31-1 Refer to the accompanying figure. Asexual reproduction is occurring at which point?

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Members of phylum Ctenophora are diploblastic but lack cnidocytes. ____________________

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In scyphozoans, the ____ is the dominant body form.

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Hermaphroditic earthworms reproduce sexually by connecting their bodies by their ____. This allows transfer of ____ from one worm to the other.

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Figure 31-6 The cross section in the accompanying figure is representative of the internal structures found in:

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Identify the distinguishing characteristics of phylum Cnidaria. Then outline the classes within this phylum and their major characteristics. Include at least one representative for each class.

Correct AnswerverifiedMembers of phylum Cnidaria are character...View AnswerShow Answer

Figure 31-5 Refer to the accompanying figure. What is the structure labeled as 9?

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Hermaphroditic earthworms reproduce sexually by connecting their bodies by their . This allows transfer of from one worm to the other.

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Members of phylum Cnidaria are character...
View Answer

Correct Answer
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