Question: The functions of a particular cell structure are described below: It allows waste to exit the cell.
It allows chemicals required for cellular respiration to enter the cell.
It regulates the movement of water into and out of the cell.

Which cell structure do these statements describe?

Answers:

A: endoplasmic reticulum

B: lysosome

C: mitochondria

D: plasma membrane

Explain why in any given geographical region, women tend to have lighter skins( by 3-4% on average) than men?

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