AP BIOLOGY

CELL DIVISION

CELL DIVISION AND CANCEROUS CELLS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Most malignant tumors are polyclonal and not monoclonal
A
true
B
false
Explanation: 

Detailed explanation-1: -The most common type of cancer on the list is breast cancer, with 290, 560 new cases expected in the United States in 2022. The next most common cancers are prostate cancer and lung cancer.

Detailed explanation-2: -Malignant tumors have cells that grow uncontrollably and spread locally and/or to distant sites. Malignant tumors are cancerous (ie, they invade other sites). They spread to distant sites via the bloodstream or the lymphatic system. This spread is called metastasis.

Detailed explanation-3: -Nevertheless, Dr. Weinberg concludes there “is a widespread consensus that the vast majority of human tumors are monoclonal growths descended from single progenitor cells that took the first small steps to becoming cancerous.”

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