It is C, the cell membrane. The membrane is responsible for controlling what goes in and out of the cell by using diffusion and osmosis. The cell wall's purpose is to give shape to the cell, so the answer is C.
Answer:
Proxima Centauri is 4.243 light years away
Explanation:
Answer:
only 30% of total energy will be useful ..
So, Useful energy =

13.5J energy is useful
Answer:
How everything on the earth are interconnected.
Explanation: