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vaieri [72.5K]
3 years ago
11

When does the placenta begin to form?

Biology
1 answer:
AfilCa [17]3 years ago
6 0

Answer:A few days after fertilization

Explanation

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A negative feedback initiated by the external simuli or the products of a reaction aims to reduce the products/ output of the reaction. Hence In negative feedback the stimulus is reduced. An example of a negative feedback would be if a person had an elevated body temperature, the homeostatic response would be to lower the body temperature.

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olya-2409 [2.1K]

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75% brown, 25% white

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