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Biology 11 Online
OpenStudy (anonymous):

Tom wants to study the sleep behavior of his roommate Harry so he checks Harry's brain waves at 30 minutes and 90 minutes after his friend has fallen asleep. Harry is probably in ________ after 30 minutes and in ________ after 90 minutes. A)REM, NREM B)NREM, REM C)REM, stage 4 D)stage 1, stage 2

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