PREVIEW

... ame species, the costs of reproduction between individuals of different genders vary.

The female side often has to devote a lot of time and energy to nurturing its offspring. To say nothing of other aspects, reproductive activities alone take away some nutrients from the mother.

For the male side, reproduction is usually just a low-consumption, simple activity, which benefits quickly spreading branches but leads to intense competition among males.

To pass on their genetic ...

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