14. within a single use of the scientific method, which of the following steps can only be performed after data is collected? a. controls and variables are chosen. b. the initial experiment is designed. c. the initial hypothesis is formed. d. conclusions are drawn.

The answer is D. Conclusions are drawn. 
This is the only choice that can be done after data gathering, formulation, and analysis.

Other choices are in correct

A. Controls and variables are chosen.  (Identified before an experiment)
B. The initial experiment is designed. (Has been planned before an experiment is done.)
C. The initial hypothesis is formed. (Before the experiment a hypothesis is already drawn.

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.