| 21. | The circadian rhythm and synchronization of mating behaviour to planetary cues are examples.
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| 22. | If we know there are circadian rhythms, then this has ramifications.
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| 23. | The party invitations arrive in the mail with a circadian rhythm.
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| 24. | What drove circadian rhythms to evolve has been an enigmatic question.
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| 25. | :: There are lots of genetic mutations known to induce circadian rhythm abnormalities.
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| 26. | The urge to nap may be due to our circadian rhythms.
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| 27. | The photic response is likely linked to effects of light on circadian rhythms.
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| 28. | Then scientists discovered the brain-based clock isn't the only control of circadian rhythms.
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| 29. | Circadian rhythms are also responsible for the afternoon drowsiness that many workers experience.
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| 30. | Zebrafish spawn best in the morning due to their Circadian rhythms.
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