| 21. | They are particularly notable for their ecological speciation and large size.
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| 22. | Speciation, however, appears to have been unusually drawn-out.
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| 23. | In plants, polyploidy must be included in any view of speciation.
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| 24. | Reinforcement favoring reproductive isolation is required for both parapatric and sympatric speciation.
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| 25. | Evidence for the role ecology plays in the process of speciation exists.
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| 26. | This validates the reproductive isolation mechanism, a key component of speciation.
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| 27. | Nevertheless, some TEs generate large families often associated with speciation events.
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| 28. | The speciation diagram for citric acid was produced with the program HySS.
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| 29. | Many of these rapid changes may contribute to reproductive isolation and speciation.
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| 30. | Even the differences between recognized subspecies are probably a matter of gradient speciation
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