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Looking at them, could you guess which one is the male and which is the female?
The list below shows some of these characteristic differences between human males and females.
Free 5-day trial Have you ever really considered the differences between males and females in various species?
If you have, you may have noticed the differences in physical traits between the two sexes.
This is an example of a secondary sex characteristic in the species.
In the insect world, there are interesting differences, too.