All terms in this list:

evolution: A gradual process of development, formation, or growth, esp. one leading to a more advanced or complex form.

artificial selection: intervention by humans in the breeding of plants or animals in order to preserve selected genetic traits

natural selection: A process in which individual organisms or phenotypes that possess favourable traits are more likely to survive and reproduce: the differential survival and reproduction of phenotypes.

variation: (Can we verify(+) this sense?) A distinct object or thing.

adaptation: Adjustment to extant conditions: as, adjustment of a sense organ to the intensity or quality of stimulation; modification of some thing or its parts that makes it more fit for existence under the conditions of its current environment.

extinction: The action of making or becoming extinct; annihilation.