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In biology, animals are heterotroph (meaning they must ingest other organisms to survive) eukaryotic (a particular type of cell-structure) organisms with a fixed body-plan during at least one stage of their life-cycle, most of them motile (moving of their own volition).

This includes almost every multicellular organism we're familiar with that is not fungus or plant, including humans.

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∙ 12y ago

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