Besides the ability of some cancer cells to over proliferate, which of the following situations might logically result in a tumor? A) changes in the order of cell cycle stages B) lack of appropriate cell death C) inability to form spindles D) failure of cells to enter S phase

Answer: A

Explanation: Cancer is unchecked cell growth. Mutations in genes can cause cancer by accelerating cell division rates or inhibiting normal controls on the system, such as cell cycle arrest or programmed cell death. As a mass of cancerous cells grows, it can develop into a tumor.