Experimental research shows that physical activity has a positive impact on children's cognitive functioning.

A person who has the most common form of color blindness will probably have the hardest time distinguishing between

a. red and green. b. yellow and blue. c. tan and pink. d. yellow and red. e. orange and red.

Among normally aging adults, infection or reactions to prescription drugs can result in ____

a. memory loss and confusion c. chronic illness b. Parkinson's disease d. schizophrenia