| 11. | Perhaps the biological clock could be reset with just a few cones.
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| 12. | Fellow boomers, can you hear the tick-tick-tick of the biological clock?
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| 13. | This synchronization could be due to the presence of an internal biological clock.
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| 14. | These leaf movements are also controlled by the plant's biological clocks.
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| 15. | WB at 8 : The snooze alarm goes off on Hilda's biological clock.
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| 16. | When people catch up on sleep, Kuo said their biological clocks get altered.
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| 17. | What's a busy career woman to do as her biological clock ticks down?
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| 18. | Many women also thought their biological clocks would ticktock just a little longer.
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| 19. | "What biological clock ? " she answers without hesitation when prodded.
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| 20. | Many blind people with no conscious perception of light have normal biological clocks.
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