Coevolution occurs when the evolution of two species (or more) is influenced by the biological relationships between those species. It is, the evolution takes place in a mutually dependent manner. A type of coevolution, is that of the type Predator-Prey , in which a selective pressure on the prey generates new features to avoid being captured, but at the same time, the predator evolves to overcome the new features adopted by the prey becoming a more effective hunter. Thus, coevolution often leads to an evolutionary arms race between prey and predator
