Answer:
I think the answer is D because mens testosterone levels are high until the age of 40, then the lower.
Explanation:
The cell membrane is made of a protein layer that is sandwiched between 2 phospolipid layers. It has pores that allow selective passage of substances in and out of the cell.
Answer:
Hey mate....
Explanation:
This is ur answer.....
<em>In diffusion, particles move from an area of higher concentration to one of lower concentration until equilibrium is reached. In osmosis, a semipermeable membrane is present, so only the solvent molecules are free to move to equalize concentration.</em>
Hope it helps!
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Simple diffusion is.........
