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The human fetus develops fingers and toes between 28 and 54 days after conception but cannot develop fingers and toes before or after that time. this is an example of _____

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The answer would be the critical period. In this stage, the fetus is undergoing the stage of maturation. The nervous system is sensitive and very responsive to its environment. If the fetus does not respond to the environment or stimuli, this will affect physiological and emotional growth

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