altruism
131Meme — For other uses, see Meme (disambiguation). A meme (  /ˈmiː …
132Sexual selection — This article is about the evolutionary concept. For the selection of the sex of offspring, see sex selection. Goldie s Bird of paradise: Ornamented male above; female below. Paradesia decora by John Gerrard Keulemans (d.1912) Sexual selection, a… …
