4. The follicular phase starts on Day 6. a. What happens to the estrogen level during the follicular phase?
b. Where does the estrogen come from?
The estrogen comes from ovaries.

pls help

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explanation:

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a scenario where a cell may be needed to perform a form of endocytosis is when transporting large molecules. a scenario where a cell may be needed to perform a form of exocytosis is when releasing the large molecule from the cell.