Diane Dodd's experiments using fruit flies demonstrated that A) the evolution of reproductive barriers occurs much too slowly to produce measurable effects in the laboratory.
B) new species can form in a single generation by the production of new reproductive structures.
C) formation of a reproductive barrier between two populations is more likely if they experience and adapt to different environmental conditions.
D) reproductive barriers usually are absolute: Either two populations are fully willing and able to interbreed, or they are strictly separated by a fully effective reproductive barrier.

Reproduction i think

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.