What portion of an adolecent's sleep time is spent in REM?

a. 40% c. 20%
b. 50% d. 30%

c. 20%

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Blank #4 sounds like "ach-tee-en.". What would you transcribe here?

What will be an ideal response?

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________ An organism is the highest level of organization of the human body

Indicate whether the statement is true or false

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