AP BIOLOGY

Detailed explanation-1: -A tumor (also called neoplasm) is an abnormal mass of cells in the body. It is caused by cells dividing more than normal or not dying when they should. Tumors can be classified as benign or malignant. Benign tumors are those that stay in their primary location without invading other sites of the body.

Detailed explanation-2: -Cancer is a disease in which some of the body’s cells grow uncontrollably and spread to other parts of the body. Cancer can start almost anywhere in the human body, which is made up of trillions of cells.

Detailed explanation-3: -Gene mutations in cancer cells interfere with the normal instructions in a cell and can cause it to grow out of control or not die when it should. A cancer can continue to grow because cancer cells act differently than normal cells. Cancer cells are different from normal cells because they: divide out of control.

Detailed explanation-4: -It is only when they keep on changing and start to divide uncontrollably, forming lumps or growths, that one of the more than 200 diseases called cancer develops. Growths like this are called tumors.