How did sex pop up? (Introduction)

by George Jelliss , Crewe, Wednesday, September 23, 2009, 23:28 (5331 days ago) @ dhw

I thought the explanation given by "Sprite" was adequate.-1) At one time there was no such thing as sexual reproduction.
True but there was reproduction.-2) Sexual reproduction requires two sets of organs/structures. 
But they can be in the same organism. 
And they don't have to be very different.-The following goes into detail, but is a bit technical:
http://en.wikipedia.org/wiki/Evolution_of_sexual_reproduction-This site ends with the intriguing idea that males are parasites!
http://www.evolutionary-philosophy.net/sex.html

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GPJ