One primary function of the cell membrane is 1) regulating the flow of simple sugars into or out of the cell
2) synthesizing substances by breaking down cell organelles
3) storing carbohydrates, water, and starches for future use
4) digesting carbohydrates, fats, and protein

I am guessing the 1st option

Explanation:

Because it regulates the movement of substances in and out of cells.

sand 60

clay 10

silt 30

sandy loam should be dominated by the sand. as the amount of sand increased, the amount of slit needed to anchor the plants' roots to the sand will also be increased. even though the amount is very little, 10% part of clay is still necessary for proper oxidation.

there's no big difference.

explanation:

the only little different between a rabbit and bunny is just that bunnies are much smaller than rabbits. bunnies are basically baby rabbits.