|MadSci Network: Neuroscience|
Color vision actually makes it easier to identify elements in our surroundings that would have helped our ancestors survive. For example, if you look at an orange tree in black and white versus color you will notice that it is much easier to spot the oranges with color vision. It is not far-fetched at all to suggest that our ancestors who were tree-dwellers and ate fruit, would find it advantageous to have color vision. Thus having color vision would provide a survival advantage and be selected for. Let me just make a second point which is that we do not have color vision to be able to see fruits better. It is important to understand that there is no purpose in evolution. We developed color vision because it improved the survival of our species. The point is subtle, but I think important. If you are interested look up the meaning of teleological arguments. cheers, gabriel vargas md/phd
Try the links in the MadSci Library for more information on Neuroscience.