At age 18 years, the beginning of emerging adulthood, about ____ of Americans have had intercourse at least once, and by age 25 nearly ____ emerging adults have had intercourse
50%; all
75%; all
25%; 75%
25%; 50%
50%; all
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The effects of fetal alcohol syndrome:
A. continue into adolescence and adulthood B. are less severe than fetal alcohol effect C. tend to lessen in adulthood D. are reduced by vitamin therapy
Nearly half of the pregnancies in the United States are unplanned
Indicate whether the statement is true or false
Which of the following is true about REM sleep?
A. We are more likely to dream during REM sleep than at any other time during the night. B. Adults spend most of their sleeping hours in REM sleep. C. Muscles are more tense and active during REM sleep than non REM sleep. D. Only about half of all adults experience REM sleep.
Temper tantrums become common at ______ of age.
A. 6 months B. 1 year C. 2 years D. 3 years