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Once the environment changes, your equillibrium is punctuated and you speciate very quickly.— Pharyngula
They didn't speciate, but if a noticable and measurable morphological change can occur in less than 20 years, I think it is reasonable to say speciation could occur relatively quickly, IF SELECTION WAS STRONG ENOUGH.— Pharyngula
They live on a single island, but can breed together in times of plenty during El Niños, and then speciate again when times are tough— remote central
If beneficial mutation A exists at one place in the population, and equally beneficial mutation B exists at another, it seems to me that so long as the population doesn't speciate— Citizendium, the Citizens' Compendium - Recent changes [en]
Only species speciate, but their multiplication resembles that which goes on at lower levels.— American Scientist Online
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