Until the past century, people who survived into young adulthood and beyond were nevertheless susceptible to death from infection diseases such as ____

If schizophrenia were exclusively a genetic disorder, __________.

A. anyone with schizophrenia in their family history would develop schizophrenia B. the concordance rate for monozygotic twins would be 100 percent C. marrying a schizophrenic would not increase the likelihood of developing schizophrenia D. numerous cures would now be available

Based on current research, are the only children in today's China less cooperative and more self-centered than previous generations of Chinese youngsters when there wasn't a limit on family size?

a. Yes — these "onlies" are less concerned with pleasing their parents' and other adults' requests. b. Yes — only children in China tend to be less interested in academics than past generations of children. c. Yes and No — these "onlies" still follow the requests of their elders, but they do so only if it also benefits themselves too. d. No — only children in China are no different than non-only children of past generations.