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Now researchers have discovered that animals reproduce together, rather than simply cloning themselves, because it helps them to ward off parasites.

The findings support the evolutionary theory that blending of two animals' genomes creates an offspring with a new genetic code which may make it more resistant to attack, experts said.

Cross-fertilisation helps creatures stay a step ahead in the continuous "arms race" with parasites, which are forever evolving to try and infect them.

http://www.telegraph.co.uk/science/science-news/8626725/Scientists-discover-the-point-of-sex.html

07/09/11
 
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