________ is the hormone that triggers the development of secondary sex characteristics in men.

Which of the following statements about nicotine are true?

a) In terms of addictive power, nicotine is more powerful than heroin or alcohol. b) Nicotine can slow the heart and therefore create a sense of relaxation c) overall, the number of Americans smoking is on the increase d) overall, the number of women and teenagers smoking is on the decrease

In __________ research, the researcher can tell whether an association or relationship between two factors exists

a) scientific b) correlational c) hypothetical d) experimental