Would I research about organic chemicals or prokaryotes? I would choose prokaryotes, and this is why.
Prokaryotes are a group of organisms whose cells lack a membrane-bound nucleus; actually they were named prokaryotes because of their lack of nucleus. They are the oldest, most abundant, and most adaptable organisms on earth. About 50% of prokaryotes can move towards a desirable stimulus (food, warmth, etc.) or away from an undesirable one (toxins, etc.). Prokaryotes handle a radiation that is lethal to humans, their acidity would dissolve metal, and a handful of soil can contain more prokaryotes than the total number of human beings who ever lived.
Prokaryotes use a wide variety of structures to facilitate motility; because of this they have a velocity that can exceed 50 times body length per second and their water resistance is equivalent to concrete. In a human, it would be as if we could run 190 mph inside concrete. Its flagellum is made out of 42 different kinds of protein, and their population can double in an hour. There are about 150 different prokaryotic species living on your skin, with 10 million individuals per square cm. They feed off oils and dead cells.
The best-known prokaryotes are pathogens, since they are the harmful ones. All known pathogenic prokaryotes are bacteria, and they cause 4 million deaths per year from bacteria-caused tuberculosis and diarrhea. Lyme disease from Borrelia burgdorferi infects 18,000 people per year. Like these there are others, but many prokaryotes are beneficial, actually the vast majority of them neither helps nor harms.
In conclusion, prokaryotes interact with other species in the community in many ways, the most notable ones as decomposers. While many bacteria are pathogenic, most prokaryotes are not harmful and many are very useful to humans and other species. Prokaryotes have diverse means of obtaining nutrition, and humans have put them to use in the production of food and useful materials as well as creating fuel and cleaning up the environment. Besides, it would be nice to discover more about them.