Zusammenfassung der Ressource
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Animals are classified into
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vertebrates are animals with
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More than four legs
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A hard outside shell
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backbones
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Inverebrates are animals without
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Mammal, reptiles, fish, birds, reptiles and amphibians are
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Vertebrates
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Invertebrates
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Mollusks
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Arthropods, echinoderms, annelids, mollusks and crustaceans are
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Mammals
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Fish
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Invertebrates