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speciation |
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speciationEmergence of a new species during evolutionary history. One cause of speciation is the geographical separation of populations of the parent species, followed by reproductive isolation and selection for different environments so that they no longer produce viable offspring when they interbreed. Other causes are assortative mating and the establishment of a polyploid population. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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The evolutionary divergence of agriculture, its structure and lifestyle preferences creates new opportunities for broadcasting and its ability to be the only effective local medium. Mitochondrial DNA mutates rapidly, making it useful for timing the evolutionary divergence of closely related species like dogs and wolves. Analysis of DNA from mitochondria in the animals' cells revealed little difference between rhinos in eastern and western Sumatra but a 1 percent difference between the Bornean and other Sumatran populations, indicating an evolutionary divergence. |
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