Two closely related species of frogs live by the same pond. species a feeds on flies and caterpillars, while species b feeds on grasshoppers and worms. explain how the two species coexist?

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.

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When a virus invades a host the most common threat is "the destruction of cells by viral reproduction".hope my answer has you : )