If cells taken from the ectoderm are grown in isolation,they form skinlike tissues;if they are grown with mesoderm cells,they form nervous system tissue.This observation suggests that cell development is

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The observation that cells taken from the ectoderm form different tissues depending on whether they are grown in isolation or with mesoderm cells suggests that the immediate environment plays a role in cell development. This suggests that cell development is affected by the environment in addition to genetic factors. Therefore, option C is the best choice.

If Cells Taken from the Ectoderm Are Grown in Isolation,they