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Discussion and Debate
Discussion and Debate
Physical & Life Sciences
Creation & Evolution
Natural Selection or Luck
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<blockquote data-quote="lucaspa" data-source="post: 736408" data-attributes="member: 4882"><p>Micaiah, you are concerned with deaths not directly related to the trait under selection.</p><p></p><p>Futuyma addresses that (which is one reason people should really read an evolutionary biology textbook).</p><p></p><p>"Thus much, perhaps most, of the mortality suffered by a population may be random with respect to this locus or character [hoofs in horses, for example]&nbsp; These nonselective deaths may be contrasted with selective death, those that contribute to the difference in fitness between genotypes.&nbsp; Even <strong>if</strong> most mortality is nonselective, the selective deaths that do occur can be a potent source of natural selection.&nbsp; For instance, genetic differences in swimming speed in a small planktonic crustacean might well not affect the likelihood of being eaten by baleen whales, which might be the major source of mortality.&nbsp; But if swimming speed affects escape from another predator species, even one that accounts for only 1 percent of the deaths, there will be an average difference in fitness, and swimming speed may evolve by natural selection." Futuyma, Evolutionary Biology, pg 368.</p></blockquote><p></p>
[QUOTE="lucaspa, post: 736408, member: 4882"] Micaiah, you are concerned with deaths not directly related to the trait under selection. Futuyma addresses that (which is one reason people should really read an evolutionary biology textbook). "Thus much, perhaps most, of the mortality suffered by a population may be random with respect to this locus or character [hoofs in horses, for example] These nonselective deaths may be contrasted with selective death, those that contribute to the difference in fitness between genotypes. Even [B]if[/B] most mortality is nonselective, the selective deaths that do occur can be a potent source of natural selection. For instance, genetic differences in swimming speed in a small planktonic crustacean might well not affect the likelihood of being eaten by baleen whales, which might be the major source of mortality. But if swimming speed affects escape from another predator species, even one that accounts for only 1 percent of the deaths, there will be an average difference in fitness, and swimming speed may evolve by natural selection." Futuyma, Evolutionary Biology, pg 368. [/QUOTE]
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