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While this is an obvious example of sibling conflict, the one-sided interaction between tadpoles and frogs could be seen as a form of parent-offspring conflict, in which the offspring attempts to extract more from the interaction than the parent is willing to provide. In this scenario, a tadpole climbing onto an unwilling frog— who enters the ...
The black walnut secretes a chemical from its roots that harms neighboring plants, an example of competitive antagonism.. In ecology, a biological interaction is the effect that a pair of organisms living together in a community have on each other.
Diagram of the six possible types of symbiotic relationship, from mutual benefit to mutual harm. The definition of symbiosis was a matter of debate for 130 years. [7] In 1877, Albert Bernhard Frank used the term symbiosis to describe the mutualistic relationship in lichens.
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As a definition, "a family or domestic group is matrifocal when it is centred on a woman and her children. In this case, the father(s) of these children are intermittently present in the life of the group and occupy a secondary place. The children's mother is not necessarily the wife of one of the children's fathers."
Robert Ludlow "Bob" Trivers (/ ˈ t r ɪ v ər z /; born February 19, 1943) is an American evolutionary biologist and sociobiologist.Trivers proposed the theories of reciprocal altruism (1971), parental investment (1972), facultative sex ratio determination (1973), and parent–offspring conflict (1974).
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The coefficient of relationship is a measure of the degree of consanguinity (or biological relationship) between two individuals. The term coefficient of relationship was defined by Sewall Wright in 1922, and was derived from his definition of the coefficient of inbreeding of 1921. The measure is most commonly used in genetics and genealogy.