Which of the following is not a postulate of cell theory?
All living cells possess a cell wall.
The main postulates of cell theory are:
• All living organisms are composed of one or more cells.
• The cell is the basic unit of structure, function, and organisation in all organisms.
• All cells come from pre-existing, living cells.
All living cells do not have cell walls. It is unique to plants, fungi, bacteria and some protists.