Question

Characteristics of cancer is
A. All tumors are cancers
B. Cancers show metastasis
C. Cancerous cells show the property of contact inhibition
D. All viruses are oncogenic

Answer 1

A common mechanism used by the body for growth and repair in cancer cells that divide relentlessly, form solid tumors, or flood the blood with irregular cell division. The most conclusive aspect of cancer cells is that they continue to divide even when they are not expected to divide and even when there is no room available for them.

Complete answer:
Cancer is a disease that is caused in a part of the body by the unregulated division of abnormal cells. The cancer cells are unable to stop the division of cells and they begin to take up the nutrients of the material needed for the normal cells to survive. They continue to divide and form a tumor that is a group of cells developed in a small space where they do not fit, taking up space and nutrition for other cells (if the cancer is caused by mutation of the cells). Cancer undergoes the cell cycle like any other cell, but the difference is that after a certain number of cell cycles, they do not stop. And when there is no room left, they keep on dividing.
These cancer cells grow very quickly, entering and destroying normal tissues surrounding them. They also starve normal cells by fighting for essential nutrients as these cells actively divide and expand. Cells sloughed through the blood from such tumors hit distant locations, and wherever they are lodged in the body, a new tumor starts there. The most feared property of malignant tumors is this characteristic called metastasis. Therefore, metastasis demonstrates the characteristics of cancer.
So, option B, i.e., 'Cancer shows Metastasis' is the right answer.

Note: Cell is the fundamental unit of life. The cell is capable of performing all the functions of life, which is only why it is named as a functional unit of life. Cancer cells continue to divide even at sunset, they do not have enough space to divide and nor do they need to divide. Cancer cells undergo the cell cycle like regular cells, but after a certain number of cell cycles, they do not stop.