NEET BIOLOGY

Detailed explanation-1: -Cancerous cells continue growing and moving when they touch other cells. They pile up and they migrate to other parts of the body–the cancer spreads.

Detailed explanation-2: -Mechanism. Contact inhibition is a regulatory mechanism that functions to keep cells growing into a layer one cell thick (a monolayer).

Detailed explanation-3: -Malignant tumors have cells that grow uncontrollably and spread locally and/or to distant sites. Malignant tumors are cancerous (ie, they invade other sites).

Detailed explanation-4: -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.

Detailed explanation-5: -Carcinomas are the most common type of cancer. They are formed by epithelial cells, which are the cells that cover the inside and outside surfaces of the body. There are many types of epithelial cells, which often have a column-like shape when viewed under a microscope.