Question

which statement best describes cancer cells? they grow as a single layer of cells. they cease to reproduce after 20–50 mitotic divisions. they reproduce only when needed to replace missing cells. they are not regulated by contact inhibition.

Explanation:

Normal cells stop growing when they come in contact with other cells (contact inhibition). Cancer cells lack this regulation and keep growing and dividing uncontrollably. They don't grow as a single - layer typically, can divide far more than 20 - 50 times, and reproduce without proper regulation, not just when needed to replace cells.

Answer:

They are not regulated by contact inhibition.