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Sand dollars, sea urchins, and starfish are ____.
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annelids
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Kangaroos, koalas, wombats, and opossums are ____.
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arthropods
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Arachnids, crustaceans, insects, and myriapods are ____.
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echinoderms
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Clams, oysters, slugs, snails, and cephalopods are ____.
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flatworms
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Beetles are ____, whereas spiders are arachnids.
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insects
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Nematodes are roundworms. Flukes and tapeworms are ____.
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marsupials
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Large mammals with hooves (cows and horses) are ____.
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mollusks
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Earthworms and leeches are ____ (segmented worms).
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ungulates
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