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 other organism will act in a similar manner at a later time.

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Source: Wikipedia · Image: Wikimedia Commons · CC BY-SA 3.0

EUSOCIALITY

The science of social life — ants, bees, termites, mole-rats and the biology of cooperation, kinship, and colony behavior.

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