In a population of rabbits, there may be several different colors, light brown through dark brown, with many shades in between. provides for this variation in the population of rabbits. this variation is the basis for natural selection.

In a population of rabbits, there may be several different colors, light brown through dark brown, with many shades in between. Environmental effects on genetic variation provides for this variation in the population of rabbits. This variation is the basis for natural selection. Natural selection is a theory that states that the environment is an important factor in the genetics of an individual to make the individual better suited for the environment it is in.