1. All living organisms are composed of one or more cells.

2. The cell is the basic unit of structure and organization in organisms.

3. All cells arise from pre-existing cells.

Therefore, the cell theory does not state that:

* All cells are identical. Cells are highly diverse in terms of their structure and function.

* Cells are always visible to the naked eye. Many cells are microscopic and can only be seen with a microscope.

* Cells are the smallest unit of life. There are smaller structures within cells, like organelles, which carry out specific functions.

Let me know if you have any other questions about the cell theory!