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This question is asking us about the relationship between sexual selection and sexual dimorphism.
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So sexual selection is a kind of natural selection in which individuals of one gender influence the survival and reproduction of individuals of the other gender.
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So sexual selection comes in two types.
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And these have different names, but most commonly they are intersexual selection.
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And in intersexual selection, individuals are one gender choose, actively choose individuals of the other to mate with.
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And it's most commonly seen as female choice.
00:49
So females choose males that they like to mate with.
00:54
And then there's also intracosexual selection.
01:01
And in intracultural selection, this is often called male combat.
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So males compete for access to females.
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All right, so sexual selection has two kinds, intersexual selection and intracosexual selection.
01:28
Sexual dimorphism refers to having the genders with different phenotypes that they look different.
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So sexual dimorphism, the genders look different.
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And of course, often this isn't the case in many, many species.
01:54
Including almost all plants, for example, there is no sexual dimorphism, but we tend to be used to sexual dimorphism because most of the time we can readily discern males and females and human beings...