Adaptive radiation is the process by which one species evolves into two or more species.
This occurs as a result of different populations becoming reproductively isolated from each other, usually by adapting to different environments. There are 20 different kinds of amino acids in living things. Proteins are composed of different combinations of amino acids assembled in chain-like molecules. Amino acids are primarily composed of carbon, oxygen, hydrogen, and nitrogen. In taxonomy , the convention established by Carolus Linnaeus whereby genus and species names are used to refer to species.