title: Cooperation-The role of past and present.
authors: Department of Ecology and Evolution/Population Biology, Evolutionary Biology Centre, Uppsala University, Norbyvägen 18 D, 752 36 Uppsala, Sweden. jan.ekman@ebc.uu.se
authors: Jan
authors: J
authors: Ekman
mesh_terms: D000222:Adaptation, Physiological; D000533:Altruism; D000818:Animals; D001522:Behavior, Animal; D003299:Cooperative Behavior; D006379:Helping Behavior; D012098:Reproduction; D012726:Sexual Behavior, Animal; D012931:Social Environment