Which Statement Regarding Biological Clocks Is True

question 59

Multiple Choice

Which statement regarding biological clocks is true?

• A) The period of an animal's free-running rhythm is not affected by light‒dark cycles.
• B) Biological clocks are very sensitive to internal (cellular) temperature.
• C) Nocturnal animals often have periods of free-running rhythms much shorter than 24 hours.
• D) Biological clocks permit the timing of processes during 24-hour periods when environmental cues are unreliable.

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