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Beetles are ____, whereas spiders are arachnids.
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crustaceans
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Sponges are ____ (members of the simplest animal phylum).
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flatworms
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Beavers, squirrels, and chipmunks are ____ (gnawing mammals).
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insects
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Nematodes are roundworms. Flukes and tapeworms are ____.
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monotremes
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Platypuses and echidnas are ____ (egg-laying mammals).
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poriferans
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Barnacles, crabs, crayfish, lobsters, and shrimp are ____.
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primates
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Lemurs, gibbons, baboons, chimps, and humans are ____.
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rodents
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Large mammals with hooves (cows and horses) are ____.
|
ungulates
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