Evolution (Introduction)

by xeno6696 , Sonoran Desert, Friday, July 31, 2009, 03:38 (5390 days ago) @ David Turell

1. Traditional Darwinian evolution, micro changes over time that give rise to novel organisms over geologic time.
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> Another study to show microevolution, color change in a bird species:
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> http://www.sciencedaily.com/releases/2009/07/090714104000.htm - But here's a key question, how many of those changes would it take before you would be willing to call it a new species? Part of my own confusion about your evolutionary distinctions hinges on that. - Actually, what is your definition of micro and macroevolution... because I picked up Pigliucci's book again (for his refutation of "science as a meta-narrative") and came across what he called a common confusion between micro and macro. Biologists call microevolution anything that can be studied by population genetics and molecular biology, and macroevolution to what is studied by paleontology and anthropology. I'd have to read the book again to see what he says regarding the validity of Darwin v. Huxley but I remember him considering the question a non-issue.

--
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