Evolutionary psychologists have found that women's voices are __________ when they are fertile

According to the text, the use of manufactured amphetamine drugs such as methamphetamine peaked in which year:

a. 1975 b. 1990 c. 2001 d. There has not yet been a peak since usage continues to increase each year.

In response to cold temperatures, the _________ nervous system stimulates _________fat activity

a. parasympathetic; white b. parasympathetic; brown c. sympathetic; white d. sympathetic; brown