In a population of birds, the percentage of
individuals having a certain gene changes from
20% to 60% over the span of several hundred
years. this situation will most likely affect the
rate of
(1) biological evolution
(2) asexual reproduction
(3) gene mutation
(4) ecological succession

1) biological evolution 

if the genes changes keeps increasing means its going through evolution 

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.