Which of the following best describes the usual pattern of dreaming?
a. People experience two 15-minute dream episodes per night.
b. People dream about four or five times a night, with dreams spaced 90 minutes apart.
c. People have more dreams during NREM sleep than during REM sleep.
d. People dream only during the third cycle of sleep before they awaken in the morning.
B
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In which of the following countries are dizygotic twins most common?
Canada Scotland United States Nigeria
Marcia, a fifteen-year-old, is a talented musician and a member of her school's band. She is most likely to become friends with __________
a) Susan, who plays several instruments and is trying to start her own band b) Jason, who is president of the chess club and is considering a math major in college c) Samantha, who is academically gifted and is writing her first novel d) William, who spends almost all of his free time working on cars for his friends