Examlex
Herbig-Haro objects are almost always found in pairs on either side of a young protostar.
Inclusive Fitness
Genetic contribution an individual makes by reproducing, plus a fraction of the contribution it makes by facilitating reproduction of relatives.
Altruistic Behavior
Actions by an individual that benefit others at a cost to oneself, observed in social species, which may promote cooperation and social cohesion.
Kin Selection
Type of natural selection in which individuals with the highest inclusive fitness are favored.
Selfish Herd
A behavioral strategy where individuals in a group position themselves centrally to reduce predation risk.
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