If a trait such as intelligence is highly heritable within a group, then differences between groups must also be due mainly to heredity

Individuals who display cycles of fasting, bingeing, and purging are said to suffer from __________ nervosa

Fill in the blank with the appropriate word.

According to your textbook's conclusions about gender and depression,

a. the gender ratio has changed dramatically during the last decade, so that the number of depressed men is roughly equal to the number of depressed women. b. it's difficult—but important—to address the social problems that make depression more common in women than in men. c. women are more likely than men to benefit from the use of antidepressants. d. politicians tend to emphasize that depression is caused by societal problems, rather than by biological factors.