When deprived of time cues, people tend to show activity cycles that are
A) exactly 24 hours long.
B) a little less than 24 hours long.
C) a little more than 24 hours long.
D) completely unpredictable.

Question

Quizplus · Accepted Answer

Without external time cues, the body tends to have cycles that are slightly longer than 24 hours. This is known as a circadian rhythm, and it has been observed in studies where participants are kept in a controlled environment without access to clocks or daylight.

When Deprived of Time Cues, People Tend to Show Activity