One American study found that nearly 50% of African American girls had begun to develop breasts or pubic hair or both, compared to __________ of White girls.

In adult humans, successive exposures to moderately low doses of amphetamine have been shown to produce

a. intensification of most of its subjective effects b. tolerance to all of its subjective effects c. intensification of some of its effects while other effects exhibit tolerance d. virtually no tolerance to amphetamine's subjective effects

The "myth of male intellectual superiority" is derived from which of Darwin’s ideas??

a. ?natural selection b. ?variability hypothesis c. ?the survival of the fittest d. ?sexual selection e. ?emotional expression