True/False
Indicate whether the sentence or statement is true
or false.
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1.
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Most
flatworms are not parasitic.
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2.
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A
tapeworm absorbs nutrients directly through its body wall.
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3.
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All
flukes are parasites.
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4.
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Schistosomiasis results from tapeworm infestation.
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5.
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The
acoelomate body plan is the least complex body plan.
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6.
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Germ
layers are embryonic layers of cells that develop into specific structures.
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7.
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Rotifers move by means of a muscular organ called the mastax.
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8.
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Most
roundworms are parasitic.
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Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
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9.
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turbellarians : free living :: a. | planaria : parasitic | c. | cestodes : free living | b. | tapeworms : free
living | d. | flukes :
parasitic | | | | |
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10.
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To
which phylum do roundworms belong? a. | Annelida | c. | Platyhelminthes | b. | Nematoda | d. | Arthropoda | | | | |
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11.
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Roundworms have a fluid-filled cavity between the gut and body wall called
a a. | coelom. | c. | digestive
system. | b. | pseudocoelom. | d. | None of the above | | | | |
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12.
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The
evolution of body cavities was important because a. | fluids within the body cavity aid in circulation of materials
from one part of the body to another. | b. | fluids in the cavity make the body rigid and offer resistance
to muscles, aiding in movement. | c. | organs are better able to function if they can move freely
within the body cavity. | d. | All of the above | | |
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13.
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Schistosomiasis is a disease caused by a a. | roundworm. | c. | cestode. | b. | trematode. | d. | planarian. | | | | |
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14.
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A
dormant larval parasite surrounded by a hard protective covering is a: a. | cyst | c. | host | b. | proglottid | d. | egg | | | | |
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15.
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Which
of the following is an example of a parasitic roundworm? a. | planarian | c. | fluke | b. | tapeworm | d. | hookworm | | | | |
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16.
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All
of the following are examples of roundworms except: a. | pinworms | c. | hookworms | b. | flukes | d. | Ascaris | | | | |
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17.
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A
proglottid is best described as a. | an excretory organ | c. | a hermaphroditic reproductive unit | b. | the larval form
of the tapeworm | d. | the seat of
consciousness in tapeworms | | | | |
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18.
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The
planarian's flame cells: a. | synthesize powerful enzymes that help the animal digest
food | b. | are
bioluminescent organs used by planarians to signal one another | c. | are reproductive
organs | d. | excrete water and liquid waste | | |
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