Changes

DNA mutations alone cannot drive evolution. This is why "living fossils" do not evolve; they are in an environment with little to no selection pressure on them because they are so well adapted. As a result, the animals change very little over time, aside from a small amount of random genetic drift.

DNA mutations alone cannot drive evolution. This is why "living fossils" do not evolve; they are in an environment with little to no selection pressure on them because they are so well adapted. As a result, the animals change very little over time, aside from a small amount of random genetic drift.

When natural selection is added to the equation, there is a mechanism by which good mutations can be screened from bad ones, and a mechanism for gene frequencies to change in a way that allows a species to slowly adapt to their environment. Not all mutations are beneficial, obviously, but the environment punishes bad DNA very quickly, and after billions of years life has become very sophisticated, even on the smallest scales.

When natural selection is added to the equation, there is a mechanism by which good mutations can be screened from bad ones, and a mechanism for gene frequencies to change in a way that allows a species to slowly adapt to their environment. Not all mutations are beneficial, obviously, but the environment punishes bad DNA very quickly, and after billions of years life has become very sophisticated, even on the smallest scales.[[User:TonyPark|TonyPark]] 12:18, 13 January 2012 (EST)

===What a creationist would reply===

===What a creationist would reply===