Multiple Choice
Which statement is true regarding the sleep needs of humans and other animals?
A) Dolphins do not sleep because they would drown.
B) Humans sleep on one side of the brain at a time which is why they are not totally unresponsive while sleeping .
C) Sunlight and darkness are external time markers that tie humans to a 24-hour sleep-waking cycle.
D) All animals need sleep.
Correct Answer:
Verified
Correct Answer:
Verified
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