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.