Which of the following is not part of the cell theory?

a. every living thing is composed of cells.

b. cells come from pre-existing cells.

c. cells are the basic unit and structure of all living things.

d. every cell has a nucleus that contains genetic material.

The option D) 'Every cell has a nucleus that contains genetic material' is not a part of the cell theory.

Explanation:

The cell theory has three main postulates which are:

The cell theory does not claim that every cell shall have a nucleus. The prokaryotes lack a nucleus yet still are living things. However, all cells will have genetic material in the form of DNA or RNA.

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