Stuart jogs with his brother each morning, and they are able to talk about their plans for the day in short bursts of conversation. which best describes their heart rates during this activity?
low moderate vigorous dangerous

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.