PhysOrg Posted January 28, 2022 Share Posted January 28, 2022 Sex is an expensive business, biologically speaking. Finding a suitable mate takes time and energy. Offspring are also a huge investment of resources. But sex does offer a rewarding possibility: children who are fitter than their parents thanks to new and "better" combinations of genes. Darwin realized that many animal species therefore carefully select their mates.View the full article Quote Link to comment Share on other sites More sharing options...
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