I am aware that it's physically possible, but what makes you think that as many people would have the desire, motivation or ability to have children, specially when they would most likely be single?
I am aware that it's physically possible, but what makes you think that as many people would have the desire, motivation or ability to have children, specially when they would most likely be single?
Isn't the prevalence of sexual reproduction something of an evolutionary mystery?
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Organisms that clone themselves use much less time and energy - which poses the question of why sex is still the dominant form of reproduction.
The team studied creatures that unusually use both clonal and sexual methods of reproduction.
They concluded that sexual reproduction evolved to help future generations fight infection.
Sex allows genes to mix, allowing populations to evolve quickly and adapt to changing environments.
The team at Stirling used water fleas to test the costs and benefits of sex as they can reproduce both ways. They found that sexually-produced offspring were more than twice as resistant to infectious disease as their clonal sisters.
Ummm you forgot the conclusions down at the bottom of the article....
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They found that sexually-produced offspring were more than twice as resistant to infectious disease as their clonal sisters.
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"By comparing clonal and sexual daughters from the same mothers, we found sexually produced offspring get less sick than offspring that were produced clonally. The ever-present need to evade disease can explain why sex persists in the natural world in spite of the costs."
However, those organisms are far and away less complex than say a human. So sure it uses less energy because there is less there to begin with.