The theory proposed by Robert Trivers (1972) used sex differences in parental investment to explain different mating systems. If females of a species have high parental investment and necessary male parental investment is low, Trivers' theory predicts that _______________ would be most common.

Question

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Polygyny is most common under these conditions because males can enhance their reproductive success by mating with multiple females, who each require significant investment in offspring, while males can afford lower investment.

The Theory Proposed by Robert Trivers (1972) Used Sex Differences