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Most roundworms are free-living. Most flatworms are ____.
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aquatic
|
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Most birds and reptiles are ____ (egg-laying).
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dorsal
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Most mammals and birds are ____ (warm-blooded).
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endothermic
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The ____ (bottom) shell of a turtle is called the plastron.
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feral
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Cobras, vipers, scorpions, and centipedes are ____ predators.
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oviparous
|
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Domesticated animals that have returned to the wild are ____.
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parasitic
|
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Manatees, porpoises, seals, and walruses are ____ mammals.
|
venomous
|
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The ____ (top) shell of a turtle is called the carapace.
|
ventral
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