Sexual dimorphism is a good predictor of mating systems because:
a) sexual dimorphism causes a difference in parental investment between males and females which results in different variance in reproductive success; therefore when one is known the other can be inferred.
b) when males are bigger than females, males are able to contribute more to their offspring than females resulting in polyandry; therefore, sexual dimorphism determines mating system.
c) mating systems cause variance in reproductive success which results in sexual dimorphism; there for when one is known the other can be inferred.
d) the degree of sexual dimorphism and the type of mating system present in a species are both determined by the difference in parental investment between the male and female; therefore when one is known the other can be inferred.
e) only polygynous mating systems exhibit sexual dimorphism, so if sexual dimorphism is present the mating system is known.
Ans: d) the degree of sexual dimorphism and the type of mating system present in a species are both determined by the difference in parental investment between the male and female; therefore when one is known the other can be inferred.
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