Clenbuterol was first detected in Olympic athletes in 1992 . Originally developed as a bronchodilator for treating asthma, this drug is
A. an anabolic steroid.
B. a beta-2 agonist.
C. a serotonin agonist.
D. a derivative of strychnine.
B
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Which of the following does NOT represent an average person's preference for morningness or eveningness?
a. Sharon is 19 years old and often falls asleep in her 8:00 am class. b. Evan is 8 years old and loves waking up to watch Saturday morning cartoons, which begin at 7:00 am. c. Jill is 40 years old and enjoys waking up at 6:30 am to get to her morning yoga class. d. Allison is 20 years old on her university's rowing team and easily wakes up for 5:00 am practice six days a week.
Since the early 1800s, the average age of first menstruation in Europe and the United States has
a. been dropping b. been rising c. remained the same d. been dropping, but lately has risen