Question 1

Figure 31-4  Refer to the accompanying figure. What is the structure labeled as 6?

Accepted Answer

A)   anus
B)   gills
C)   cilia
D)   mouth
E)   digestive tract

Question 2

Ctenophores capture food:

Accepted Answer

A)   with filter feeders.
B)   using adhesive glue cells that trap prey.
C)   with stinging hair cells that immobilize small invertebrates.
D)   by digging through the bottom mud for small invertebrates.
E)   with a sticky mucus on their tentacles that capture small invertebrates.

Question 3

Figure 31-2  Refer to the accompanying figure. What is the structure labeled as 8 in the figure?

Accepted Answer

A)   anus
B)   mouth
C)   ganglia
D)   eyespots
E)   pharynx

Question 4

The circulatory system of cephalopods is closed, whereas that of all other mollusks is open. Explain the difference between open and closed circulatory systems, and describe how each system is adequate for the groups possessing it.

Accepted Answer

Concepts to Consider: An open circulator...

Question 5

Ribbon worms have a unique ____ that is used to capture prey.

Accepted Answer

A)   proboscis
B)   tentacle
C)   set of jaws
D)   forked limb
E)   stinging cell

Question 6

Most arachnids have ____ pair(s)  of jointed appendages.

Accepted Answer

A)   one
B)   two
C)   four
D)   six
E)   eight

Question 7

Figure 31-3  The structure shown in the accompanying figure is from an animal in phylum:

Accepted Answer

A)   Cestoda.
B)   Turbellaria.
C)   Trematoda.
D)   Monogenea.
E)   Platyhelminthes.

Question 8

Complete ____ reduces competition among insects within the same species; larval forms do not compete with adults for food or habitats.

Accepted Answer

A)   mobilization
B)   reproductions
C)   differentiation
D)   morphogenisis
E)   metamorphosis

Question 9

Which of the following statements about arthropods is FALSE ?

Accepted Answer

A)   Arthropods have a true coelom
B)   Arthropods have an exoskeleton.
C)   Arthropods display segmentation.
D)   Arthropods have an open circulatory system.
E)   Arthropods have an incomplete digestive tract.

Question 10

Figure 31-2  Refer to the accompanying figure. What label designates the auricles on this organism?

Accepted Answer

A)   1
B)   2
C)   3
D)   4
E)   5

Question 11

Members of the phylum ____ are the simplest organisms with a separate mouth and anus.

Accepted Answer

A)   Platyhelminthes
B)   Ctenophora
C)   Placozoa
D)   Porifera
E)   Cnidaria

Question 12

Which is a unique adaptation in insects not found in any other arthropod?

Accepted Answer

A)   wings
B)   cephalization
C)   segmentation
D)   hard exoskeletons
E)   specialized mouthparts

Question 13

Figure 31-4  The larva in the accompanying figure is characteristic of which group of organisms?

Accepted Answer

A)   mollusks
B)   cnidarians
C)   nematodes
D)   arthropods
E)   platyhelminthes

Question 14

Figure 31-7  Which insect in the accompanying figure represents a group that parasitizes plants?

Accepted Answer

A)   1
B)   2
C)   3
D)   4
E)   5

Question 15

List two characteristics that have contributed to the biological success of the insects, and briefly explain the adaptive value of each characteristic that you identified.

Accepted Answer

Exoskeleton: protection against predator...

Question 16

The first animals to show cephalization have several characteristics. Which of the following is NOT one of them?

Accepted Answer

A)   These animals were triploblastic.
B)   These animals had a proboscis.
C)   These animals were in phylum Platyhelminthes.
D)   These animals are placed in the group Lophotrochozoa.
E)   These animals followed the protostome pattern of embryonic development.

Question 17

Members of the Ecdysozoa clade are characterized by having a cuticle. 
____________________

Accepted Answer

A) True 
 B)False

Question 18

Which is critical to polychaete and oligochaete locomotion?

Accepted Answer

A)   jointed appendages
B)   parapodia
C)   tentacles
D)   setae
E)   fins

Question 19

A radula is characteristic of certain members of phylum Platyhelminthes . 
____________________

Accepted Answer

A) True 
 B)False

Question 20

One characteristic of class Bivalvia is that they:

Accepted Answer

A)   are active swimmers.
B)   use a radula to feed on algae.
C)   possess two shells with a hinge.
D)   use their mantle for locomotion.
E)   possess shells of overlapping plates.

Exam 31: Sponges, Cnidarians, Ctenophores, and Protostomes

Figure 31-3 The structure shown in the accompanying figure is from an animal in phylum:

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Members of the phylum ____ are the simplest organisms with a separate mouth and anus.

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Which is a unique adaptation in insects not found in any other arthropod?

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Figure 31-4 Refer to the accompanying figure. What is the structure labeled as 6?

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Figure 31-2 Refer to the accompanying figure. What is the structure labeled as 8 in the figure?

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One characteristic of class Bivalvia is that they:

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Members of the Ecdysozoa clade are characterized by having a cuticle. ____________________

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Complete ____ reduces competition among insects within the same species; larval forms do not compete with adults for food or habitats.

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Ribbon worms have a unique ____ that is used to capture prey.

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Figure 31-2 Refer to the accompanying figure. What label designates the auricles on this organism?

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Figure 31-7 Which insect in the accompanying figure represents a group that parasitizes plants?

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The first animals to show cephalization have several characteristics. Which of the following is NOT one of them?

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Most arachnids have ____ pair(s) of jointed appendages.

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A radula is characteristic of certain members of phylum Platyhelminthes . ____________________

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Figure 31-4 The larva in the accompanying figure is characteristic of which group of organisms?

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Which is critical to polychaete and oligochaete locomotion?

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The circulatory system of cephalopods is closed, whereas that of all other mollusks is open. Explain the difference between open and closed circulatory systems, and describe how each system is adequate for the groups possessing it.

Correct AnswerverifiedConcepts to Consider: An open circulator...View AnswerShow Answer

List two characteristics that have contributed to the biological success of the insects, and briefly explain the adaptive value of each characteristic that you identified.

Correct AnswerverifiedExoskeleton: protection against predator...View AnswerShow Answer

Which of the following statements about arthropods is FALSE ?

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Ctenophores capture food:

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Concepts to Consider: An open circulator...
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Exoskeleton: protection against predator...
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Correct Answer
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Correct Answer
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