Why are females bigger than males in a lot of species?



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    Females may be physically dominant or larger than males for many reasons. It may depend on their mating habits or hunting habits. For some species, the females provide food to their young and do not rely on a male to provide food for their brood. In one example, the anglerfish, extreme physical differences have been noted. The female looks typical of an anglerfish, and the male is a tiny parasite with no digestive system, that must parasitically attach himself to a female to survive. However, there are not all that many species in which the female is larger than the male. Most male mammals are larger than their female counterparts.

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