Cultures in which individuals are encouraged to put time and energy into projects that will help large groups of people in their own society are best described as:

According to the text, what best explains girls' superior performance in school and the relatively poor performance of boys?

a. Girls report more positive experiences in the classroom. b. Girls feel greater support by their parents. c. Girls have higher contact time with their teachers. d. All of these answers are correct.

Sue has a disorder that is produced by an injury to a gene on the X chromosome, producing mild to moderate mental retardation. She has __________

a) Down syndrome b) Tay-Sachs disease c) Fragile X syndrome d) Klinefelter's syndrome