Which Statement Is True Regarding the Sleep Needs of Humans

question 80

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.

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