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True/False
Indicate whether the sentence or statement is true
or false.
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1.
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Planarians have a branched digestive tract with both a mouth and an
anus.
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2.
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Most
flatworms are not parasitic.
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3.
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Tapeworms absorb food from their host’s intestine directly through their
skin.
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4.
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Humans can avoid trichinosis by wearing shoes when they walk through
fields.
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5.
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Rotifers have a distinct head end with a mouth and a distinct tail end that has an
opening through which substances from the digestive, reproductive, and excretory systems exit the
body.
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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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6.
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Flatworms can reproduce asexually by a. | fission. | c. | producing
polyps. | b. | forming larvae. | d. | exchanging both sperm and eggs. | | | | |
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7.
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Which
of the following is not found in flatworms? a. | a
head | c. | bilateral
symmetry | b. | a circulatory system | d. | a nervous system | | | | |
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8.
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Flatworms have no need for circulatory and respiratory systems
because a. | the digestive
system performs these functions. | b. | their cells are close to the animal’s exterior
surface. | c. | the spherical body shape allows diffusion of materials into
tissues. | d. | the coelom is bathed in blood and
oxygen. | | |
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9.
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Schistosomiasis is a disease caused by a a. | roundworm. | c. | cestode. | b. | trematode. | d. | planarian. | | | | |
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10.
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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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11.
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Which
of the following statements about tapeworms is false? a. | They can infect
a person who eats improperly cooked beef. | b. | They belong to the genus
Schistosoma. | c. | They can grow to be large in human
intestines. | d. | These flatworms do not have a digestive
system. | | |
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12.
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To
which phylum do roundworms belong? a. | Annelida | c. | Platyhelminthes | b. | Nematoda | d. | Arthropoda | | | | |
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13.
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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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14.
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Pseudocoelomates a. | must move rapidly to enhance diffusion of
nutrients. | b. | must be very small or have body shapes with short distances
between organs and the body surface. | c. | must have a circulatory system. | d. | All of the
above | | |
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15.
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The
first organisms to develop an internal body cavity were the a. | flatworms. | c. | mollusks. | b. | nematodes. | d. | arthropods. | | | | |
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16.
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All
of the following groups of invertebrates are coelomates, except a. | annelids. | c. | mollusks. | b. | echinoderms. | d. | nematodes. | | | | |
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17.
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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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18.
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The
nematode Ascaris lumbricoides infects humans, spending most of its adult life inside the
intestines of its host. To be infected, a person must a. | consume the
nematode’s eggs. | c. | sit on an
infested toilet seat. | b. | walk barefoot on infested soil. | d. | All of the above | | | | |
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19.
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A
type of roundworm that lives a parasitic life is a. | Ascaris. | c. | Trichinella. | b. | Necator. | d. | All of the
above | | | | |
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20.
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Rotifers eliminate excess water that they collect from their freshwater environment
by a. | diffusion. | c. | flame cells and
excretory tubules. | b. | kidneys. | d. | a
mastax. | | | | |
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