Ch. 27 STP
Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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All of the following are mollusks EXCEPT
a. | leeches | d. | clams | b. | squids | e. | snails | c. | octopi |
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2.
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Which invertebrates have segmented bodies?
a. | flatworms | d. | annelids | b. | roundworms | e. | flukes | c. | planarians |
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3.
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Which are NOT parasitic roundworms?
a. | hookworms | d. | tapeworms | b. | filarial worms | e. | trichonosis-causing worms | c. | ascarid
sorms |
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4.
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The body cavity in annelids is called a(an)
a. | coelom | d. | trochophore | b. | pseudocoelom | e. | acoelom | c. | scolex |
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5.
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A scientist conducts an experiment to test the hypothesis that earthworms aid in
the growth of plant roots. She grows two identical plants in pots A and B but adds earthworms only to
pot B. Which of the following is true about the experiment?
a. | There is no control. | b. | There is no difference between pots A and
B. | c. | Either pot could serve as the control. | d. | Pot A is the control. | e. | Pot B is the
control. |
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6.
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The simplest animal to develop from three germ layers belongs in the
phylum
a. | Mollusca | d. | Nematoda | b. | Annelida | e. | Gastropoda | c. | Platyhelminthes |
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7.
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Water balance is maintained in the body of a planarian by
a. | nephridia | d. | scolex | b. | flame cells | e. | cilia | c. | proglottids |
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8.
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Which characteristics apply to flatworms?
I. Cephalization
II. Bilateral
symmetry
III. Segmented bodies
a. | I only | b. | II only | c. | I and II
only | d. | II and III only | e. | I, II, and III |
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9.
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Includes gastropods, bivalves, and cephalopods
a. | Flatworms | d. | Snails | b. | Roundworms | e. | Mollusks | c. | Annelids |
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10.
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Has internal walls, or septa, between body segments
a. | Flatworms | d. | Snails | b. | Roundworms | e. | Mollusks | c. | Annelids |
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11.
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Usually has an internal or external shell
a. | Flatworms | d. | Snails | b. | Roundworms | e. | Mollusks | c. | Annelids |
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12.
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Has a pseudocoelom
a. | Flatworms | d. | Snails | b. | Roundworms | e. | Mollusks | c. | Annelids |
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13.
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Includes turbellarians, flukes, and tapeworms
a. | Flatworms | d. | Snails | b. | Roundworms | e. | Mollusks | c. | Annelids |
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14.
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The process illustrated in the diagram is known as
a. | fission | d. | hermaphroditism | b. | sexual reproduction | e. | metabolism | c. | scolex |
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15.
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The spots on the heads of the planarian are sensitive to
a. | heat | d. | chemicals | b. | light | e. | touch | c. | sound |
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