
Animals produce endogenous circadian rhythms that last about a day.
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Q1: Alternation between wakefulness and sleep depends completely
Q3: High levels of 'Per' and 'Tim' are
Q6: Alpha waves are characteristic of relaxation, not
Q7: Biological clocks are very resistant to environmental
Q11: Dreams only occur during REM sleep.
Q12: A disruption of circadian rhythms due to
Q13: Melatonin is released by the SCN.
Q13: Melanopsin is required for producing circadian rhythms.
Q15: Blind and deaf animals do not have
Q20: The biological clock depends on part of
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