Sexual dimorphism's are
a) observable physical differences within single gender (e.g. tall men vs short men.)
b) observable physical differences between the genders (e.g differences in mens and women's brains)
c) assumed differences in the capacities of the genders (e.g the belief that men drive better than women)
d) odd, abnormal, or deviant sexual behaviors (e.g voyeurism or exhibitionism)
http://en.wikipedia.org/wiki/Sexual_dimorphism
So is it B?
I don't think any of these answers is correct. Differences in male and female brains is not an observable difference.
Sexual dimorphism refers to the observable physical differences between males and females of a species. These differences can be seen in various aspects, including size, shape, coloration, and behavior.
Out of the options provided, option b) "observable physical differences between the genders" is the correct definition of sexual dimorphism. It describes the variation in physical characteristics between males and females of a species.
To arrive at the answer, you can use the process of elimination based on the given definitions:
a) This option describes physical differences within a single gender, which does not align with the concept of sexual dimorphism.
c) This option pertains to assumed differences in the capacities of genders, such as driving abilities, which is not directly related to physical differences and does not capture the essence of sexual dimorphism.
d) This option refers to specific sexual behaviors, such as voyeurism or exhibitionism, which are not the same as physical differences between males and females.
Therefore, option b) is the correct description of sexual dimorphism.