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Unformatted text preview: speciation require allopatry or can speciation occur in non-allopatric contexts (sympatric, parapatric)?; 2) does speciation require changes in many genes or can changes in a few specific genes lead to speciation?; 3) is speciation itself adaptive or does speciation occur as a byproduct of adaptive responses to other pressures?; 4) what determines the rates of speciation ? (some lineages speciate at very different rates)....
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- Fall '10