Editing Natural selection (section)

===By unit of selection===

Selection can also be classified by the level or [[unit of selection]]. Individual selection acts on the individual, in the sense that adaptations are "for" the benefit of the individual, and result from selection among individuals. [[Gene selection]] acts directly at the level of the gene. In [[kin selection]] and [[intragenomic conflict]], gene-level selection provides a more apt explanation of the underlying process. [[Group selection]], if it occurs, acts on groups of organisms, on the assumption that groups replicate and mutate in an analogous way to genes and individuals. There is an ongoing debate over the degree to which group selection occurs in nature.<ref>{{cite journal |author=Wade, Michael J. |display-authors=etal |title=Multilevel and kin selection in a connected world |journal=Nature |date=2010 |volume=463 |issue=7283 |pages=E8–E9 | doi=10.1038/nature08809 |pmid=20164866 |pmc=3151728|bibcode=2010Natur.463....8W }}</ref>