Changes

*[[DNA]] - The [[DNA]] of different [[species]] shows how they are related to one another and can be used to trace the features of a common ancestor. This is the case for [[human]]s and other great apes.

*[[Antibiotic Resistance]] - Since the invention of [[antibiotic]]s it has been observed that [[bacteria]] have '''evolved by natural selection''' to become immune to the effects of the [[antibiotic]]s.