Sexual Dimorphism

Sexual dimorphism is that the systematic difference in form between individuals of various sex within the same species. For example, in some species, including many mammals, the male is larger than the feminine. In others, such as some spiders, the female is larger than the male. Other sex-specific differences include color (most birds), song in birds, size or presence of parts of the body utilized in struggles for dominance, like horns, antlers, and tusks; size of the eyes (e.g., in the case of bees); possession of stings (various kinds of bees), and different thresholds for certain behaviors (aggression, infant care, etc.). Sexual dimorphism in humans is that the subject of much controversy. Human male and feminine appearances are perceived as different, although Homo sapiens features a low level of sexual dimorphism compared with many other species. The similarity within the sizes of male and feminine citizenry may be a exemplar of how nature often doesn't explain divisions. To give an accurate picture of male and feminine size differences one would wish to point out what percentage individuals there are in each size category. There is a considerable overlap. The phenomenon of sexual dimorphism may be a direct product of evolution by survival, therein the struggle for reproductive success drives many male and feminine organisms down different evolutionary paths. This can produce sorts of dimorphism which, on the face of it, would actually seem to disadvantage organisms.  

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