Evolution remains a complex subject. It is obvious that environment influences variation in species, all one has to do is observe the different skin colors in Homo Sapiens.to see these results. These of course are macro variations and we do not know the biochemical reactions in genes that ocurred to cause these differences. Some think that Darwin's theory does not hold up to its proclamations and I would like to post an attempt at refutation of the theory to dicuss some finer points. I do believe that adaptation to environment takes place, although I do not understand the chemical mechanism. I do not believe there can be evolution upon demand, such as a primitive animal growing wings to help escape predators, when no wings were present in ancestors. Please read this link as it provides many areas of discussion.
Darwinism Refuted.com
