Which of the following would be considered a beneficial genetic alteration?
a. many current europeans have a gene for bubonic plague resistance.
b. people from africa descent have higher amounts of melanin increasing resistance to skin cancer.
c . peppered moths changed from gray to black during the industrial revolution in england.
d. all of the above

D. all of the above because all of these answers have a beneficial impact on the survival of the species.

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.