Rapid evolution of male adaptations and female counter-adaptations, explicitly predicts that changes in male and female characters should be correlated as coincidental transformations on internal branches of a phylogeny. Other researchers had shown the translucent, waterborne creatures could survive for 40 million years without sexual relations.Sexual conflict in mating systems, due to differences in investment and direct mating costs, can lead to intersexual arms races, as well as being a potential engine of speciation. “It is like having a bigger tool kit,” Alan Tunnacliffe, a molecular biologist at the University of Cambridge, said in a telephone interview. This gives the rotifers a wider pool of genes to help them adapt and survive, the researchers said in the journal Science. REUTERS/HandoutĪsexual reproduction has allowed duplicate gene copies of the single-celled creatures - called bdelloid rotifers - to become different over time. Asexual reproduction has allowed duplicate gene copies of the single-celled creatures to become different over time. The microscopic organism has thrived despite remaining celibate for tens of millions of years thanks to a neat evolutionary trick, researchers said. Single-celled creatures called bdelloid rotifers are seen in this handout picture released October 11, 2007.
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