Why Physiology is now the key to understanding Evolution

The standard Neo-Darwinist theory of evolution assumes that genetic change is random with respect to function. On this view physiology is relevant only as a way of explaining why some variations are selected over less successful ones. We now know there are other ways in which organisms can adapt functionally to the environment and pass this information on to their progeny. Evolution therefore can occur via more mechanisms than assumed by Neo- Darwinism. As the study of function, physiology has now become one of the keys to understanding evolution. The implications for healthcare are also highlighted.Keywords: Evolution, Neo-Darwinism, Lamarckism, Epigenetic