1. All living organisms are made up of one or more cells. This is the foundation of cell theory and means that life cannot exist without the fundamental unit of a cell.
2. The cell is the basic unit of structure and function in all living organisms. Cells are not only the building blocks of life, but they also carry out all the essential processes for life, such as metabolism, reproduction, and response to stimuli.
3. All cells arise from pre-existing cells. This statement emphasizes that life does not spontaneously arise from non-living matter; new cells are always formed through the division of existing cells.
