The hippocampus plays a role in

A genetic abnormality transmitted by a recessive gene that prevents an infant from

metabolizing an amino acid found in many foods, resulting in intellectual developmental disorder and emotional disturbance, is ______. a. Klinefelter's syndrome c. phenylketonuria b. Turner's syndrome d. Tay-Sachs disease

Which statement is true about free-radical damage?

A) It triggers biological aging. B) It reduces longevity. C) It increases with age. D) It decreases with age.