Question

Which statement best describes cancer cells?

A. They grow as a single layer of cells.
B. They cease to reproduce after 20–50 mitotic divisions.
C. They reproduce only when needed to replace missing cells.
D. They are not regulated by contact inhibition.

Answer 1

That would be D.

Cancer cells are not regulated by contact inhibition.

They do not stop dividing when a single layer of cells is made and form clumps of cells(tumors). They divide(mitotically) several times and have lost control of their cell cycle.