On an expedition to a barren land that had witnessed volcanic activity, geologists noticed heavy lichen growth on some of the hard lava. in other areas, lichens were replaced by grasses. after many years, the geologists expect to find the area filled with full-grown hardwood trees, grasses, and shrubs. what is this process called?
a. succession
b. mutualism
c. competition

The answer is A. Succession.

Succession is the process of change in the structure of species in some community or ecosystem. Succession is important because it leads to mature and stable communities. The purpose of succession is for an ecosystem to reach balance state right after it is formed or after it is disturbed by man or some disasters. It will increase biodiversity and help to prevent the desertification.

Some of her  assignments would be creation of drugs. she is a medical chemist after all so she'd need to have the necessary knowledge to make medicine which can later be sold in a pharmacy 

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.