We can see a candle flame at 30 miles on a clear, dark night, and we can hear the tick of a watch 20 feet away in a quiet room. These two facts are examples of __________

When looking in the yellow pages, psychiatrists are generally listed under

a. "Mental Health Associations.". b. "Marriage and Family Counselors.". c. "Physicians.". d. "Counseling Services.".

Most men first develop testicular cancer as a(n) ____

a. painless testicular mass b. inflammation of the glans penis c. lower back, pelvic, or upper thigh pain d. inability to urinate