Ethology — Not to be confused with ethnology. Animal Behavior redirects here. For the journal, see Animal Behaviour (journal). For the Praxis single, see Transmutation (Mutatis Mutandis). Part of a series on … Wikipedia
Sexual 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… … Wikipedia
Spider — Taxobox name = Spiders image width = 250px image caption = an Orb weaver spider, Family: Araneidae regnum = Animalia phylum = Arthropoda subphylum = Chelicerata classis = Arachnida ordo = Araneae ordo authority = Clerck, 1757 diversity link =… … Wikipedia
Morality — Appropriate redirects here. For other uses, see Appropriation (disambiguation). Morality (from the Latin moralitas manner, character, proper behavior ) is the differentiation among intentions, decisions, and actions between those that are good… … Wikipedia
Reciprocal altruism — Diagram showing reciprocal altruism In evolutionary biology, reciprocal altruism is a behaviour whereby an organism acts in a manner that temporarily reduces its fitness while increasing another organism s fitness, with the expectation that the… … Wikipedia
Eusociality — Insect queen redirects here. For the comics characters, see Insect Queen. A swarming Meat Eater ant colony. Eusociality (Greek eu: good/real + social ) is a term used for the highest level of social organization in a hierarchical classification.… … Wikipedia
Group selection — In evolutionary biology, group selection refers to the idea that alleles can become fixed or spread in a population because of the benefits they bestow on groups, regardless of the alleles effect on the fitness of individuals within that group.… … Wikipedia
Dominance hierarchy — For other uses, see Dominance. A dominance hierarchy (in humans: social hierarchy) is the organization of individuals in a group that occurs when competition for resources leads to aggression. Schjelderup Ebbe, who studied the often cited example … Wikipedia
Not in Our Genes — Cover of Not in our Genes. Not in Our Genes: Biology, Ideology and Human Nature is a 1984 book authored by evolutionary geneticist Richard Lewontin, neurobiologist Steven Rose and psychologist Leon J. Kamin in which they criticize many… … Wikipedia
Dunbar's number — See also: Dunbar (disambiguation) Dunbar s number is suggested to be a theoretical cognitive limit to the number of people with whom one can maintain stable social relationships. These are relationships in which an individual knows who each… … Wikipedia