Because without it you would have no support to stand
Answer:
(1) they keep toxic substances out of the cell.
(2) they contain receptors and channels that allow specific molecules, such as ions, nutrients, wastes, and metabolic products, that mediate cellular and extracellular activities to pass between organelles
Answer:
B. Histone because they are a family of small positively charged proteins.
The tropics are probably very moist, making a perfect environment for organisms as their habitat.
