The ability to digest lactose varies in a patchy way from place to place on which continent?

When scientists study how social behavior is related to hormones, the immune system, and neurological processes, they are studying

a. social psychology. b. neurology. c. psychiatry. d. social neuroscience.

What strategy does the Robber's Cave study suggest for reducing hostility between groups?

a. sharing social norms b. being together in the same environment c. working together in pursuit of common goals d. playing fun, competitive games, such as tug-of-war