natural selection examples
We are the only species that doesnt become lactose intolerant as we grow up. Selection happens when there is a difference in their survival success of mating. 3 Types Of Natural Selection Life Science Lessons Biology Teaching Biology At that point those bacteria best suited to their environment will survive while the rest will die off. . The more diverse a population the more likely the species will continue on in the future. The genes most affected by natural selection are those involving the immune system sexual reproduction and sensory perception. Directional selection is a type of natural selection in which one of the extreme variations in a trait is selected. Orchid and wasp image courtesy of Colin Bower. For example some beetles are green and some are Natural selection is one of the basic mechanisms of evolution along with mutation migration and genetic drift. An example of this would be directional selection due to climate change. O