The most important life sector 10 top-level creation (6)

— Clare Wilson

Birds, bees have to--the vast majority of the large number of species, sexual reproduction is the only choice. It is the planet's most remarkable biological wonders why, from the coral groups (the number of breeding them so much that he can see in space), the gardener bird (bower bird) to attract the opposite sex and elaborate show dance, adult stag's antlers, some biologists believe that poetry, music and art. Sex may even be life ideals, independent front row: renunciation of species almost within a few hundred generations towards extinction.

However, since in such important, biologists are still in the contend it is how it evolved, and how it evolved. You know, on the surface, is a failed strategy.

There are two reasons that evolution should favor asexual. First of all, in the fight for resources, in Populus species can easily overcome sexual species. Secondly, the sperm and eggs only contains half of both parties to take sexual reproduction of genes, the organism can only will own 50% of the gene to pass to the next generation. Asexual can achieve 100% pass rate.

Obviously, the above reasoning processes exist some error. Although there are many species, including insects, lizards and asexual plant, while living a leisurely, at least for now. However, a number of species in much win on.

Are mating butterflies

Of lasting success usually constantly due to genetic package regroup, introduces variability and harmful mutations is cleared (mutation will eventually wipe out most of the vegetative species). Variation is important, because it gives life to be able to respond to changes in the environment, including predator and prey — particularly parasites and host — interaction. Asexual sometimes can be compared to such a situation, bought a note 100 sheets of lottery, has all the same size. Far superior to this is that only buy 50 lottery, each number is different.

Although we may understand how effective is, but we do not know how it is. It may seem like ordinary as DNA repair. Single-cell organisms asexual might have evolved their own genetic material periodically multiplication and Division. This allows them to go through the replacement of spare components to repair any DNA damage. Similar DNA Exchange still occurs in the egg and sperm production process.

Parasites are subordinate to the framework. We know of is parasitic segment DNA transposon inserts a copy of them into the cells of normal genetic material. Imagine a unicellular organism of transposon Gets a catastrophe, it prompted the host cells before split again periodically and other cell fusion. Transposon's of original forms will be in many different cells spread horizontally. Once it appears in a population, parasitic sexual phenomenon will very quickly fashion.

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