Answer:
the basic structural, functional, and biological unit of all known organisms.
Explanation:
The cell membrane separates the intracellular environment from the extracellular environment outside of the cell. A phospholipid is composed of a phosphate group and a lipid. It is composed of a hydrophilic, polar phosphate head and two hydrophobic fatty acid tails.
The structure of the bilayer is such that the tails are shielded from contact with water, creating a selectively-permeable barrier which will be impermeable to most hydrophilic molecules.
So, the answer is A) To maintain balance of water and nutrients in the cell.
The answer is D. Food Threshold is the amount of food capable on feeding the organisms.
East or west because of the being of north and south which the latitude is on the equator
