What process takes place within mitochondria?

What do all macromolecules have in common with each other? oa. they all are formed from the same elements. ob. they all have major roles in cell membranesoc. they all act as catalysts in the body. od. they all have peptide bonds between carbon atoms.

Which are reasons cells undergo cell division?

At which point is crust neither created nor destroyed? island chain mid-ocean ridge divergent boundary transform boundary