What is true of a population? select all that apply.

a. all members live in the same area.
b. all members have the same density.
c. all members live at the same time.
d. all members are the same size.
e. all members are the same species.

Mitochondria produce atp, a high energy compound. atp is used for all sorts of enzyme-mediated reactions, such as making proteins/nucleotides/etc, certain compounds cross the cell membrane, muscles move, etc.  without this source of energy, a cell will die. it will not be able to repair itself, defend against pathogens, etc.