Q&A Forum - February 2008 (The best of Elise)

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Sex is the system used by millions of species to ensure their own existence. The reason why sex is the form of reproduction of so many species is because sex is a extremely successful system to ensure survival. Of course, this is not only because of its role in procreation itself, but because sex ensures genetic variability - consider the number of combinations of genetic material that can be obtained when an egg is fertilized - and adaptive evolution, promoting fitness for survival.