Which of the following statements is NOT a part of the cell theory?

Question

A. stem cells are undifferentiated cells

B. all living things are made of cells

C. the cell is the most basic unit of life

D. all cells come from other living cells

Answer 1

The cell theory states that cells are the basic unit of life, that living organisms are therefore made up of cells, and that living cells must come from other living cells.

That statement includes answers B, C, and D-- all of which are part of cell theory.

Answer A is a true statement-- stem cells are undifferentiated, and can differentiate into other cells. However, stem cells are not a part of the cell theory, even though we now know that stem cells are an important mechanism behind cell theory. Therefore, the statement not a part of cell theory is Answer A.