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.

What is true of all organisms in the kingdoms protista, plantae, fungi, and animalia? a. they are multi-celled. b. they are photosynthetic. c. they have cells that contain membrane-bound organelles. d. they contain cells that lack membrane-bound organelles.

What is the role of the phospholipid belayer in cellular transport in living cells

In which layer do organisms on earth love?