Question

Which is a part of the cell theory?
cells come from pre-existing cells
cells have a nucleus
organisms with one cell must be seen with a microscope
organisms must have more than one cell to live

Answer 1

What do you think?

Answer 2

A...??

Answer 3

Correct.
B can't be it because there are some cells that DO NOT have a nucleus (prokaryotes)
C can't be it because that isn't necessarily true.
D can't be it because there are organisms with only one cell (multi celled vs. single celled)