Afossil of a fern and other large-leafed plants were found in an area of alaska. what does this suggest about this area in alaska?

The answer is: the area in Alaska once had a warmer climate.

A fern and other large-leafed plants were adapted to live in a warmer climate. The large leaves prove this. It is known that the largest leaves are characteristic of the warmer climate for many reasons, such as increased of transpiration surface, or increased of photosynthetic increase, etc. If fossils of such plants are found in some colder area, such in Alaska, it suggests that this area once was warmer than today.

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.