Which of the following contribute to the metastatic spread of cancer cells? What is Cancer? QuizCancer cells ______. Cancer cells are said to "break all the rules" because they _____. Which of the following is true of normal adult cells but NOT cancer cells?Normal cells typically can only divide a limited number of times before programmed cell death occurs. However, cancer cells do not have the ability to initiate death via _________ and may divide indefinitely.