Which function does mitosis serve for a cell?

See explanation.

Explanation:

Mitosis allows the cell to duplicate itself into an exact new cell. One cell becomes two cells during mitosis. The function of mitosis is to replace dead, missing, or damaged cells. The skin for example loses cells throughout the day. Through mitosis, the cells are replaced so that the skin can continue to function.

what statement best describes the difference between the sympathetic and parasympathetic nervous systems?

the sympathetic nervous system prepares the body for intense physical activity and is often referred to as the fight-or-flight response. the parasympathetic nervous system has almost the exact opposite effect and relaxes the body and inhibits or slows many high energy functions.