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brigittmarie brigittmarie
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6 years ago
Rapid eye movement (REM) sleep occurs how frequently during non-REM sleep?
 
  a. Every 30 minutes c. Every 90 minutes
  b. Every 60 minutes d. Every 180 minutes
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RosegrayyyyRosegrayyyy
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6 years ago
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brigittmarie Author
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6 years ago
Just got PERFECT on my quiz
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Yesterday
Thank you, thank you, thank you!
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2 hours ago
Smart ... Thanks!
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