| 1. | Many of these rapid changes may contribute to reproductive isolation and speciation.
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| 2. | It is only the behavioral reproductive isolation that is addressed by koinophilia.
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| 3. | Reinforcement favoring reproductive isolation is required for both parapatric and sympatric speciation.
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| 4. | When the two varieties were cross-bred the eggs were infertile suggesting reproductive isolation.
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| 5. | Eventually, if reproductive isolation is achieved, it may lead to a separate species.
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| 6. | This validates the reproductive isolation mechanism, a key component of speciation.
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| 7. | The mechanisms of reproductive isolation have been classified in a number of ways.
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| 8. | But, scientists have long wondered, how quickly can reproductive isolation evolve?
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| 9. | The populations are evolving reproductive isolation due to differences in flowering.
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| 10. | The two ecotypes will eventually become separate species once reproductive isolation is achieved.
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