The boundary between the middle and inner ear is the

Stressful life events

a) are only related to the first episode of depression. b) are important in triggering episodes of depression. c) play little role in the onset of depressive episodes. d) mediate the relationship between genetics and environment.

Which conclusion is most accurate regarding research on the link between alcohol and aggression?

a. Drinking alcohol can increase aggression. b. There is a relationship between alcohol and aggression, but it is not clear what causes what. c. There is a relationship between alcohol and aggression for men but not for women. d. Conclusions are mixed; it is unclear whether there is actually any relationship between alcohol and aggression.