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Beavers, squirrels, and chipmunks are ____ (gnawing mammals).
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arthropods
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Cuttlefish, octopuses and squids are ____ (a class of mollusks).
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cephalopods
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Nematodes are roundworms. Flukes and tapeworms are ____.
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flatworms
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Lemurs, gibbons, baboons, chimps, and humans are ____.
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marsupials
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Arachnids, crustaceans, insects, and myriapods are ____.
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poriferans
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Sponges are ____ (members of the simplest animal phylum).
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primates
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Large mammals with hooves (cows and horses) are ____.
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rodents
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Kangaroos, koalas, wombats, and opossums are ____.
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ungulates
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