Purines: adenine and guanine
I believe the answer is hormones. correct me if i'm wrong.
Ecology is environmental science.
<span>Ecology- the branch of biology that deals with the relations of organisms to one another and to their physical surroundings.
Hope this helps!</span>
<span>Bacterial genome is prone to mutational changes due to its simple nature and less efficient DNA repair mechanisms compared to humans, thus it has more chances of obtaining new genetic traits.</span>