What Is the Similarity Between the Sleep of Infants, Cats

question 158

Multiple Choice

What is the similarity between the sleep of infants, cats, and adults who sleep 9 or more hours per night?

• A) All have a high percentage of REM sleep.
• B) All have a high percentage of stage 2 sleep.
• C) All have a high percentage of stage 3 sleep.
• D) All have a high percentage of stage 4 sleep.

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