Note in the article below from Nature, that evolutionists still have no real idea of how sexual reproduction evolved.  Defying the conservation of energy, their studies found that rotifers, capable of reproducing both sexually and asexually, tends to reproduce sexually, even though it requires a greater amount of energy to do so.  Evolutionarily speaking, there are many disadvantages to sexual reproduction, which would make one wonder how or why it evolved at all.

For more information on the evolution of sex, go to Argument: Evolution of Sex.

Sex is a costly business — at least in evolutionary terms. The question of why it emerged in the first place is the subject of heated academic debate. After all, why not simply produce clones asexually, saving energy and passing on genes more efficiently?

Research published online today in Nature1 shows that a species of rotifer that reproduces both sexually and asexually, Brachionus calyciflorus, opts for sexual reproduction more often in varied habitats than in homogeneous settings, suggesting that varied surroundings may have contributed to the evolution of sex….

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