Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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An animal is each of the following EXCEPT
a. | multicellular. | c. | heterotrophic. | b. | autotrophic. | d. | eukaryotic. |
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2.
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Animals that have no backbone, or vertebral column, are called
a. | vertebrates. | c. | deuterostomes. | b. | ectoderms. | d. | invertebrates. |
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3.
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When an animal’s environment changes, sexual reproduction improves a
species’ ability to
a. | react. | b. | increase its numbers
rapidly. | c. | evolve. | d. | produce genetically identical
offspring. |
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4.
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A blastula is a stage in the development of an embryo that consists of a
a. | solid ball of cells. | c. | flat sheet of cells. | b. | hollow ball of cells. | d. | folded sheet of
cells. |
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5.
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Which term is NOT associated with sponges?
a. | choanocytes | c. | spicules | b. | medusa | d. | gemmules |
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6.
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Which of the following best describes the feeding habits of sponges?
a. | predators | c. | parasites | b. | filter feeders | d. | detritivores |
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7.
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The benefit of a sponge’s producing gemmules is that the gemmules
a. | are a form of sexual reproduction. | b. | defend the sponge against
predators. | c. | help to filter food for the sponge. | d. | allow the sponge to survive difficult
environmental conditions. |
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8.
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Which of the following animals has an asymmetrical body plan?
a. | jellyfish | c. | sponge | b. | coral | d. | none of the
above |
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9.
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Sponges benefit some marine animals by
a. | providing a habitat. | c. | poisoning their predators. | b. | eating diseased
coral. | d. | supplying them with
oxygen. |
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10.
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Cnidocytes help a cnidarian survive by
a. | storing food. | c. | paralyzing prey. | b. | forming colonies. | d. | providing
movement. |
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11.
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The body symmetry of a cnidarian is
a. | radial in the medusa stage and bilateral in the polyp stage. | b. | radial in both the
medusa and polyp stages. | c. | bilateral in both the medusa and polyp
stages. | d. | bilateral in the medusa stage and radial in the polyp
stage. |
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12.
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In jellyfishes, the medusa stage reproduces
a. | asexually. | c. | by budding. | b. | sexually. | d. | by gemmules. |
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13.
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Cnidarians in the class Anthozoa are distinguished by
a. | having only colonial species. | c. | reproducing only
sexually. | b. | having only a polyp stage. | d. | obtaining food only from symbionts. |
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14.
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The Portuguese man-of-war is a member of what class of cnidarian?
a. | Hydrozoa | c. | Anthozoa | b. | Scyphozoa | d. | Porifera |
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15.
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Coral bleaching is a serious ecological threat because it
a. | destroys the beauty of a coral reef. | b. | causes corals to die. | c. | pollutes the
water. | d. | causes coral to overpopulate the area. |
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Completion
Complete each
statement using the word bank below.
anus, vertebrates,
polyp, feedback inhibition, gastrovascular cavity
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16.
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Animals that have a backbone, or vertebral column, are called
____________________.
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17.
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The body mechanism in which the product or result of a process stops or limits
the process is called ______________________________.
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18.
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The opening through which wastes leave a digestive tract is the
____________________.
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19.
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The internal space of a cnidarian is called a(an)
______________________________.
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20.
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In a jellyfish, the ____________________ stage reproduces asexually.
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