Re: Why Is Only \"Micro Evolution\" Acceptable?
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The ONLY non-arbitrary line between micro and macro is speciation.
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Honest to God? That doesn't seem right to me.
Say a single species is divided by a mountain range into two groups.
A brand new mutation occurs in one, say, the sickle cell trait, which I believe is only a single change in one base pair. This gives significant resistance to malaria, and spreads quickly.
To me, that is what macro evolution is -- the evolution of novel traits, as opposed to a change in how often an allele appears in a gene pool.
The sickle cell population remains able to mate with the other one, so macro evolution has occurred, but not speciation.
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