View Poll Results: Does evolution happen

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  • Evolution happens, and it is random

    65 71.43%
  • Evolution happens and is guided by a higher power

    10 10.99%
  • There is not enough information to know for sure

    7 7.69%
  • No, evolutuon does not happen

    5 5.49%
  • I don't know

    4 4.40%
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Thread: Evolution

  1. #81
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    Re: Evolution

    I absolutely believe in evolution. Now, as far as the random or guided/started by higher power, I lean towards guided but really don't know.
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  2. #82
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    Re: Evolution

    Quote Originally Posted by Redress View Post
    Tashah showed me a couple ultra cool images from gravitational lenses.
    The images are cool, but the principles behind these things are even cooler (or nerdier, depending on perspective).



    BTW, Tashah has probably forgotten more about the subject than I ever learned. The rare occasions that I have discussed physics with her (I think she generally prefers not to get involved in such discussions because they will invariably end up with her teaching people about the topic it rather than discussing the topic, and that can be tedious) have centered around this and other aspects of relativity. In those discussions I have felt ignorant of the topics, and I actually know a fair amount about them.
    Last edited by Tucker Case; 08-19-11 at 11:52 AM.

  3. #83
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    Re: Evolution

    Quote Originally Posted by Redress View Post
    Do you believe evolution happened and is happening? Do you think a higher power guides evolution or is it random?
    only a fool would deny that evolution is happening. the evidence is right before our eyes. I think the disagreement arises when you discuss micro vs macro evolution
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  4. #84
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    Re: Evolution

    Quote Originally Posted by rathi View Post
    You have no idea what you are talking about. Evolution does not claim that older species are lost when newer ones evolve. Geographic isolation is a common mechanism of evolution that retains the older species while also creating an offshoot.
    No, geographic isolation explains why we have different races, but not why part of the species evolved and part did not. If macro evolution where true, then the entire species would have evolved on similar paths rather than some evolving and some not. Further, if macro evolution where true, new races of humans would be evolving from primates today. They are not.
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  5. #85
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    Re: Evolution

    Quote Originally Posted by ksu_aviator View Post
    No, geographic isolation explains why we have different races, but not why part of the species evolved and part did not. If macro evolution where true, then the entire species would have evolved on similar paths rather than some evolving and some not. Further, if macro evolution where true, new races of humans would be evolving from primates today. They are not.
    What is your definition of micro evolution and macro evolution?
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  6. #86
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    Re: Evolution

    Quote Originally Posted by ksu_aviator View Post
    No, geographic isolation explains why we have different races, but not why part of the species evolved and part did not. If macro evolution where true, then the entire species would have evolved on similar paths rather than some evolving and some not. Further, if macro evolution where true, new races of humans would be evolving from primates today. They are not.
    I disagree with the theory of evolution, but it doesn't state that the older species would have all evolved.
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  7. #87
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    Re: Evolution

    Quote Originally Posted by marduc View Post
    What is your definition of micro evolution and macro evolution?
    microevolution, IMHO, is what Darwin described as natural selection. small changes in organisms that allow them to adapt to and better survive in their environment.

    macroevolution, large changes that actually result in one organism changing into a completely different type of organism (ie dinosaurs evolving into birds )
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  8. #88
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    Re: Evolution

    Quote Originally Posted by marduc View Post
    What is your definition of micro evolution and macro evolution?
    This sums it up:

    icroevolution is a change in gene frequency within a population over time.[1] This change is due to four different processes: mutation, selection (natural and artificial), gene flow and genetic drift.

    Population genetics is the branch of biology that provides the mathematical structure for the study of the process of microevolution. Ecological genetics concerns itself with observing microevolution in the wild. Typically, observable instances of evolution are examples of microevolution; for example, bacterial strains that have antibiotic resistance.

    Microevolution can be contrasted with macroevolution, which is the occurrence of large-scale changes in gene frequencies in a population over a geological time period (i.e. consisting of extended microevolution). The difference is largely one of approach. Microevolution is reductionist, but macroevolution is holistic. Each approach offers different insights into the evolution process. Macroevolution can be seen as the sum of long periods of microevolution, and thus the two are qualitatively identical while being quantitatively different.

    Microevolution - Wikipedia, the free encyclopedia
    But, in large part I've been using macro evolution to describe changes from one species to the next and micro to describe changes to a species.
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  9. #89
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    Re: Evolution

    Quote Originally Posted by OscarB63 View Post
    microevolution, IMHO, is what Darwin described as natural selection. small changes in organisms that allow them to adapt to and better survive in their environment.

    macroevolution, large changes that actually result in one organism changing into a completely different type of organism (ie dinosaurs evolving into birds )
    The terms macroevolution and microevolution are not really used by biologists. The reason being is that all of the phenomena of biology are ultimately obedient to the laws of physics and chemistry. As there are no physical or chemical barriers to adaptions / mutations (what you call microevolution) from eventually resulting in speciation (what you call macroevoltion), there is ultimately no difference between what you refer to as macroevolution and what you refer to as microevolution.

    A common misconception about evolution is the notion of one species turning into another species. What really happens is descent through adaptive modification over time. Some populations prosper, others don’t. Over time, as populations become isolated from one another, the process continues until they do, indeed, evolve into different species. But at no point in that process do parents belonging to one species produce offspring that belong to a different species.

    Evolution is simply change. Natural Selection is the term for the collective natural drivers for that change (adaption, mutation and so on).
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    Re: Evolution

    Quote Originally Posted by SouthernDemocrat View Post
    The terms macroevolution and microevolution are not really used by biologists. The reason being is that all of the phenomena of biology are ultimately obedient to the laws of physics and chemistry. As there are no physical or chemical barriers to adaptions / mutations (what you call microevolution) from eventually resulting in speciation (what you call macroevoltion), there is ultimately no difference between what you refer to as macroevolution and what you refer to as microevolution.

    A common misconception about evolution is the notion of one species turning into another species. What really happens is descent through adaptive modification over time. Some populations prosper, others don’t. Over time, as populations become isolated from one another, the process continues until they do, indeed, evolve into different species. But at no point in that process do parents belonging to one species produce offspring that belong to a different species.

    Evolution is simply change. Natural Selection is the term for the collective natural drivers for that change (adaption, mutation and so on).
    and yet there is no hard evidence that a fish ever evolved into a reptile.
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