How did photosynthesis alter earths atmosphere, oceans, and rock deposition?

Photosynthesis enables plants to synthesize their own food. This increases their chances of survival, and more plant species evolve to inhabit the earth. In the ocean also, organisms utilize light to prepare food and release carbon dioxide, which increases the temperature of the earth and makes it suitable to live upon. Rocks are solidified by the process, as the growth of plants and algae prevents their erosion and sliding.

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.