Richard is a nursing aide who assists Mr. Rogers. Which knowledge should he use while helping Mr. Rogers get up from his chair? A.
knowledge of the integumentary system
B.
knowledge of the circulatory system
C.
knowledge of the skeletal system
D.
knowledge of the pulmonary system

Which of the following statements concerning cancer and mutations is correct? a: cancer can only occur with a mutation in a somatic cell. b: usually, multiple mutations are required in different genes to cause cancer. c: none of the other answer options is correct. d: cancer can only occur with a mutation in a germ cell. e: usually, a single mutation is all that is required to cause cancer.