(between individuals)
31reproductive behaviour — In animals, any activity directed toward perpetuation of a species. Sexual reproduction, the most common mode, occurs when a female s egg is fertilized by a male s sperm. The resulting unique combination of genes produces genetic variety that… …
32Species — In biology, a species is one of the basic units of biological classification and a taxonomic rank. A species is often defined as a group of organisms capable of interbreeding and producing fertile offspring. While in many cases this definition is …
33Judaism — /jooh dee iz euhm, day , deuh /, n. 1. the monotheistic religion of the Jews, having its ethical, ceremonial, and legal foundation in the precepts of the Old Testament and in the teachings and commentaries of the rabbis as found chiefly in the… …
34Social behaviour in animals — Introduction actions of animals living in communities. Such behaviour may include the feeding of the young, the building of shelters, or the guarding of territory. General characteristics Social behaviour (Social behaviour in animals) …
35Industrial and organizational psychology — Psychology …
36Bipolar disorder — Manic depression redirects here. For other uses, see Manic depression (disambiguation). Bipolar disorder Classification and external resources ICD 10 F …
37HIV — Classification and external resources Diagram of HIV …
38Natural selection — For other uses, see Natural Selection (disambiguation). Part of a series on Evolutionary Biology …
39AIDS — For other uses, see AIDS (disambiguation). Acquired immunodeficiency syndrome (AIDS) Classification and external resources …
40Same-sex marriage legislation in the United States by state — This article summarizes the legal and political actions taken by the individual states of the United States regarding same sex marriage. The texts are following.Laws Regarding Same Sex Partnerships in the United Stateslegend|#ed1e24|Constitution… …
