Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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The skull and vertebrae are part of the ______ in vertebrates.
a. | circulatory system | c. | nervous system | b. | endoskeleton | d. | ectotherm |
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2.
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Sea squirts are ______.
a. | hagfish | c. | lancelets | b. | lampreys | d. | tunicates |
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3.
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Of the following, the trait that is NOT a characteristic of all chordates is
______.
a. | pharyngeal pouches | c. | a nerve cord | b. | fins | d. | a notochord |
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4.
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There are more species of ______ than all other species of vertebrates.
a. | amphibians | c. | reptiles | b. | fish | d. | birds |
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5.
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Fanlike structures in fish used for steering and balancing are called
______.
a. | fins | c. | gill slits | b. | gills | d. | scales |
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6.
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______ are ectotherms that spend time in water and on land, but lay their eggs
in water.
a. | Amphibians | c. | Reptiles | b. | Hagfish | d. | Tunicates |
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7.
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______ are ectotherms with dry, scaly skin that lay amniotic eggs.
a. | Amphibians | c. | Reptiles | b. | Fish | d. | Salamanders |
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8.
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Turtles breathe with their ______.
a. | gills | c. | lungs | b. | pharyngeal pouches | d. | skin |
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Completion
Complete each
statement.
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Complete the following sentences using the terms listed
below.
| amniotic egg | nerve cord | estivation | notochord | | postanal
tail | ectotherm | fins | vertebrae | | pharyngeal pouches | endoskeleton | cartilage | scales | | chordates | endotherm | hibernation | | | | | |
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9.
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The body temperature of a(n) ______________________ changes with its
surroundings.
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10.
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A(n) ______________________ is a structure that later develops a brain at one
end.
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11.
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Muscles attach to the ____________________, which protects internal
organs.
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12.
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The ____________________, a structure along a chordate’s body, becomes the
backbone.
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13.
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A (n) ______________________ has a body temperature that stays the same in all
climates.
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14.
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______________________ are found between the mouth and digestive tube in all
chordates.
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15.
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A period of inactivity in the winter is known as ____________________.
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16.
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Fanlike structures used by fish for steering and balancing are called
____________________.
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17.
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______________________ are overlapping, thin, hard plates that cover a
fish’s body.
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18.
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A(n) ______________________ is a muscular structure at the end of the developing
chordate.
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19.
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______________________ is a period of inactivity during hot summer
months.
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20.
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Your ears and the tip of your nose are made of ____________________.
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21.
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______________________ have a notochord, a nerve chord, and gill slits at some
time during their lives.
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22.
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The fluid-filled sac enclosed by a leathery shell that houses developing
reptilian embryos is called a(n) ____________________.
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23.
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______________________ and cartilage make up the backbone that surrounds and
protects the spinal nerve cord.
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Short Answer
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24.
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List four characteristics common to all chordates.
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Essay
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25.
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Describe the metamorphosis of a frog.
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