In any given month, about ______ percent of adults in the United States report serious psychological distress

"Jet lag" is primarily a result of

a. anxiety-producing unconscious processes. b. upset circadian rhythms. c. hangover due to drinking alcohol before flying. d. sensory isolation due to flying in an enclosed airplane for a long time. e. flying many miles above sea level.

________ twins are no more genetically similar than two siblings born at different times

a) Dizygotic b) Monozygotic c) Gamete d) Zygotic