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Parasites To Blame For Rampant Sex, Indiana University Study


7/13/2011 7:29:37 AM

It seems we may have parasites to thank for the existence of sex—as we know it. Indiana University biologists have found that although sexual reproduction between two individuals is costly from an evolutionary perspective, it is favored over self-fertilization in the presence of coevolving parasites. Sex allows parents to produce offspring that are more resistant to the parasites, while self-fertilization dooms populations to extinction at the hands of their biological enemies.

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