AP BIOLOGY

Detailed explanation-1: -Cancer is a disease in which cells divide slowly. If chromosomes do not separate correctly during the formation of sex cells, the organism that forms can end up with too many or too few chromosomes. Cancer causes the growth of tumors. Scientists think that cancer begins when something damages a cell’s proteins.

Detailed explanation-2: -Cancer is a disease caused when cells divide uncontrollably and spread into surrounding tissues. Cancer is caused by changes to DNA. Most cancer-causing DNA changes occur in sections of DNA called genes. These changes are also called genetic changes.

Detailed explanation-3: -Even if one cancer cell is left behind, it can grow and divide to become a new tumour. A new tumour can start to grow in the same area of the body where the cancer first started, or the cancer may have spread through the blood or lymphatic system to another part of the body, where it grows into a new tumour.

Detailed explanation-4: -Cancer cells have been described as immortal because, unlike normal cells, they don’t age and die, but instead can continue to multiply without end.

Detailed explanation-5: -Cancer cells grow too rapidly to mature. Normal cells mature into distinct cell types. These different cell types have specific functions.