Which statement is not included in the cell theory?

Question

a
All organisms are made up of at least one cell.
b
Cells come from cells that already exist.
c
Cells are the basic unit of structure.
d
All cells have a nucleus.

Answer 1

The statement that is not included in the cell theory is:

d) All cells have a nucleus.

Cell theory states that:

1. All organisms are made up of at least one cell.
2. Cells come from pre-existing cells.
3. Cells are the basic unit of structure and function in living organisms.

Not all cells have a nucleus, as prokaryotic cells (like bacteria) do not possess a nucleus.