The top documents tagged [backbones sponges]

Invertebrates Chapter 29 and 30 Sponges, Cnidarians, Flatworms, Roundworms, mollusks, annelids.

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CH 24 WHAT IS AN ANIMAL? CHARACTERISTICS OF ALL ANIMALS Eukaryotic Multicellular Specialized cells (tissues & organs) Ingestive heterotrophs 1.5 million.

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Invertebrates

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