A process in nature by which the organisms best suited to their environment are the
ones most likely to survive and leave descendants.
A recent theory proposing that at the level of DNA and protein sequence many changes
are adaptively neutral and have little or no effect on the molecule's function.
A complex molecule found in all cells. The two types of nucleic acids are DNA and RNA.
A round body that forms in certain regions of specific chromosomes. They help in the
formation of ribosomes, the cell's centers of protein production.
The structure in a cell that contains the chromosomes.