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Biology 13 Online
OpenStudy (anonymous):

Animals share 4 key characteristics that when combined, separate them from all other organisms. What are they? 1. Prokaryotic or Eukaryotic? 2. Cells lack: cell walls, flagella, or cell membranes? 3. Multicellular or unicellular? 4. Autotrophs or heterotrophs that decompose, makes their own, or ingest their own food?

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