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Biology 21 Online
OpenStudy (anonymous):

it must be by definition that all living things come from the same single cell and have simply evolved?

OpenStudy (zale101):

Single-cell organisms?

OpenStudy (anonymous):

I think he/she meant to ask. Is it a definition ? If it's a definition, then definition of what ? I won't say it's a definition. It's may be we can call 'Evolution' 'Cell theory' or what I can say..

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