Question

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

• A. Cell is the basic unit of life.
• B. All cells arise from pre-existing cells.
• C. All living organisms are composed of cells.
• D. All living cells have cell walls.

Answer 1

The correct option is D All living cells have cell walls.

The main postulates of the cell theory are:
$\bullet$ All living organisms are composed of one or more cells.
$\bullet$ Cell is the basic unit of structure, function, and organisation in all organisms.
$\bullet$ All cells come from pre-existing, living cells.
All living cells do not have cell walls. It is present only in plants, fungi and bacteria.