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Bettawrekonize -> RE: Natural Selection (10/26/2008 11:41:44 AM)
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quote:
ORIGINAL: irishmichael I came across this post while perusing science blogs. What do you think of it? Why Natural Selection is Not Random quote:
“I have no idea why someone would take a term like natural selection and say it is random”, said Miller when reached for an interview. Natural selection is a product of selective pressures. Those selective pressures are random in that they do not try to produce anything specific (ie: original appendages, limbs, organs, organ systems, body plans, etc... or the DNA that codes for them). Hence, natural selection is random. It doesn't try to produce anything with an end goal in mind, it simply selects out whatever happens not to survive (and whatever happens to survive is what it happened to select, which is a tautology). Natural selection doesn't look at the organism and say, "if I make selective pressures require an adaptation to cold weather, it will increase the probability of adding component A to the organism, and component A will work well with the existing components. If I make selective pressures require an adaption to hot weather, it will kill the organism. Hence, I will make selective pressures require an adaption to cold weather." Selective pressures are random. They do not have any end goal in mind and they do not care what the organism produces or how well it survives and they do not care to act in such a way that will make the organism produce interdependent systems that function together. It's like tossing an unbiased coin, the weather could be hot, it could be cold, but the temperature patterns do not purposely adjust themselves to produce anything specific (ie: limbs, etc..). Natural selection is random in that it has no purpose, just like tossing an unbiased coin, anything that is produced is done on accident. How can anyone say that natural selection is not random, what is it, purposeful? Does it try to produce anything specific with intent? Does natural selection ponder, "well, I want to produce limbs, what combination of selective pressures can do this." No, it just randomly does whatever it happens to do with no such intent in mind. Also note, the random nature of natural selection is independent of what you call it. You can call it random selection, natural selection, oooga booga, whatever, the fact that you decide to label it natural selection does not make the process being described any less random.
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