[XJarhead]

You're pre-supposing the existence of males. But how you get males and females that can mate and produce fertile male/female offspring? Where does the mating behavior come from?

No, I'm not. The shift from parthogenis to male/female offspring is the mutation that occured. You get a tiny sense that shifts like that are possible when you see people born as hermaphrodites. Hermaphrodites obviously can't engage in partAnd because it was such a successful mutation, it became the dominant pattern for advanced life.

The article basically makes the same point later on. Sex is the most efficient means for improving a species, so its pretty inevitable that such a mutation eventually would arise and become dominant.

[MEGoody]

"And because it was such a successful mutation, it became the dominant pattern for advanced life."

Please tell me, what are the most plentiful life forms on the planet. Are they not single-celled creatures who do not use intercourse for reproduction?

So how is that method of reproduction not successful?