Examlex
In which stage of meiosis I does the crossing-over of nonsister chromatids of homologous chromosomes occur?
Mind Wandering
A cognitive process of thoughts shifting away from a task towards unrelated concerns or fantasies, often occurring unconsciously.
Circadian Rhythm
The natural, internal process that regulates the sleep-wake cycle and repeats roughly every 24 hours.
Biological Clock
An internal mechanism that regulates physiological and behavioral functions on a cyclical basis, such as sleep and wakefulness.
Melatonin
A hormone produced by the pineal gland that regulates sleep and wakefulness cycles.
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