Examlex
Which of the following is categorized as a secondary pollutant?
Ultradian Rhythm
Biological rhythms with a cycle shorter than 24 hours, such as stages of sleep or the pattern of hormonal release.
Free-Running Rhythm
Rhythm of the body’s own devising in the absence of all external cues.
Zeitgeber
Environmental event that entrains biological rhythms; German for “time giver.”
Entrained
The synchronization of an organism's circadian rhythms to that of an external rhythm in its environment.
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