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Phoneswapshop · Answer 1 · 2017-05-22T17:14:58+0000

i think because they need to have variation plus it is not just a must but because multi-cellular organisms are sexual reproduction not asexual reproduction it allows for variation.

Viira · Answer 2 · 2017-05-28T09:15:51+0000

Multicellular organisms are more complex and it the organism such as a human did not differentiate the cells would not be able to compensate for all the functions that the body has developed through evolution

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