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Domesticated animals that have returned to the wild are ____.
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aquatic
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Sloths, koalas, and most chameleons are ____ (tree-dwelling).
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arboreal
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Corals and sponges are ____ (surface-attached) animals.
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endothermic
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Manatees, porpoises, seals, and walruses are ____ mammals.
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feral
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The ____ (bottom) shell of a turtle is called the plastron.
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oviparous
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Most mammals and birds are ____ (warm-blooded).
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placental
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Mammals are classified as monotreme, marsupial, or ____.
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sessile
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Most birds and reptiles are ____ (egg-laying).
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ventral
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