A. Metals
Metals do not have a basis of carbon
Answer: Helps the plant breathe: The epidermis of the leaf contains guard cells that control and regulate the small pores on the undersurface of the leaves. These pores are called stomata. Stomata are responsible for regulating water in and out of the cell. It is also responsible for the exchange of gases across the epidermis.
The answer for this question is C.
The answer would be B i believe<span>(a protease) begins the chemical digestion of protein</span>
