| 21. | Allopatric speciation is where new gene pools arise out of natural selection in isolated gene pools.
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| 22. | Allopatric speciation appears to have played an important role in shaping the evolution of this genus.
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| 23. | These species are allopatric, meaning they do not share the same habitat in any location.
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| 24. | Overall, their appearance is somewhat similar to several other pelicans, though the species is allopatric.
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| 25. | It is thought that they first originated through allopatric speciation caused by breakup of the supercontinent Gondwana.
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| 26. | But the different appearance and allopatric ranges argue in favor of recognizing the two as distinct species.
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| 27. | Isolation can induce allopatric speciation usually through genetic drift, and different environments induce different evolutionary pressures.
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| 28. | This differs from allopatric speciation in that the isolated populations are numerically much smaller than the parental population.
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| 29. | The separate populations over time may Galapagos finches, is a consequence of allopatric speciation among island populations.
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| 30. | Rather, in these birds it indicates a fairly recent allopatric selective pressure towards establishment of genetic incompatibility.
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