5. Some advantages of sexual reproduction include: (select all that apply) * a. genetic variation
b. improves chances of adapting to the envionment
c. helps species survive catastrophes
d. Certian genes work beter than other

Hope the answer is b

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.