As an average newborn, Kit would spend about ______ percent of his sleeping hours in REM sleep

According to the text, when a father is the sole caretaker, his parenting role become more:

a. authoritarian b. permissive c. like that of a grandparent d. like that of a mother

According to the research on psychological reactions to menopause, which of the following is a woman likely to experience?

a. depression b. irritability c. mood swings d. no change in symptoms related to mood