The point of contact between a motor nerve and an individual muscle cell is called the

Plants, sunlight, growth and artificial sunlight

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.

Because the carnivores keep the herbivore population in check