Answer:
Semi-permeable membrane
Explanation:
In semi-permeable membranes, only some substances can pass through. Sometimes, some can also pass through the channel protein molecules or transport proteins on the cell membrane.
Do you mean penumbra or umbra? Because it is indeed umbra.
The answer is: "<span>TATA box" .
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Age- younger people have smaller capacity
gender-males have larger capacity
muscle mass
aerobic fitness
diseases of the respitorary system
