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Please help me ill give brainless

Please help me ill give brainless-example-1

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Answer:

A. cell theory

Explanation: The cell theory states that all biological organisms are composed of cells; cells are the unit of life and all life come from preexisting life. The cell theory is so established today that it forms one of the unifying principles of biology.

I took the study Island test. I really hope this helps!! :) Have a great spring break!!

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