Which best describes density? a. the amount of matter that makes an object. b. the amount of space an object occupies. c. the amount of matter there is in an object per unit volume.

The answer cannot be b, because that would be volume. It also cannot be c because that would be mass, which leaves the answer to be a, the amount of matter that makes an object.

Atp is is our little "pocket" of energy. of course, if you have too little, then it means you have too little energy, and you'll pass out. the way to not have enough, is to have no energy sources (glucose, fats, proteins). you can't have too many atp molecules. cycles like the krebs cycle produce it, but if you have too much of any substrate (or too little for that matter), the cycle stops and atp is no longer made (it stops until substrate levels are such that the process can go on). in any case, this is unlikely since atp is constantly hydrolyzed and remade, even while you're asleep. you won't have too much. if you have zero, you are dead or dying.