5. The dramatic increase in cancer incidence with age suggests thata. cancer is caused by old age.b. genetic factors are not involved.c. cancer arises primarily in differentiated, nondividing tissues.d. cancer develops as a consequence of multiple abnormalities that accumulate over many years.
d. cancer develops as a consequence of multiple abnormalities that accumulate over many years.
The correct answer is option d. Cancer develops as a consequence of multiple abnormalities that accumulate over many years. The incidence of cancer increases dramatically with age, implying that it is a progressive disease caused by a combination of genetic and environmental factors. It takes time for these factors to interact and accumulate to the point where cancer can develop. Cancer is a complex disease that arises from multiple abnormalities in genes and cellular pathways, which can occur over a prolonged period of time. Therefore, it is unlikely that cancer is caused solely by old age or that genetic factors are not involved. Furthermore, cancer can arise in both dividing and non-dividing tissues, making it unlikely that cancer arises primarily in differentiated, nondividing tissues.
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