Explanation:
The main building material in the body.
They are carriers of vitamins, hormones, fatty acids and other substances.
Provide the normal functioning of the immune system.
Provide the state of the "apparatus of heredity".
They are catalysts of all biochemical metabolic reactions of the body.
I'm at a loss between A & C but I'm not sure, I'd go with A
An isotonic solution is a solution in which the amount of dissolved material is equal both inside and outside of the cell. Water still flows in both directions, but an equal amount enters and leaves the cell. Hope this helps. :)
It is needed by all living things and every living cell to carry out life processes, such as breaking down and building up molecules, and transporting many molecules across cell membranes. The form of energy that living things need for these processes is chemical energy, and it comes from food.
Answer:
The atmosphere
Explanation:
Most of the air travels through the atmosphere tho very little travels through the ocean from air vents, or scuba diver oxygen tanks.
I hope this helped!