According to Carlson, "The fact that our brains contain an elaborate mechanism whose sole function is to keep us paralyzed while we dream-- that is, to prevent us from acting our dreams-- suggests that the motor components of dreams are as important as the sensory components."

About ______ percent of men display some sort of color blindness

a. 1 c. 10 b. 5 d. 20

What is the solution to the dilemma of iodine deficiency in children?

a. adding iodine to meat, which is a very costly process b. adding iodine to salt, which costs a few cents per person per year c. adding iodine to the local drinking supply d. injecting iodine into children subcutaneously every two months