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the basic unit of structure and function in living things |
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| a group of similar cells that perform a specific function |
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| a group of several different tissues |
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| structures or behaviors that allow animals to perform these basic functions in their envoirnments |
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| the process by which a new organism develops from the joining of 2 sex cells |
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| the joining of an egg and a sperm cell |
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| the process by which a single organism produces a new organsism identicle 2 itself |
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| biologists have clasified animals into 35 major groups, each of which is called..... (phylum) |
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| animals w/ out a backbone |
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