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Classical cell theory:
1. All organisms are made up of cells.
2. Cells are the basic units of life.
3. Cells comes from pre-existing cells that have multiplied. 
Modern cell theory:
1. During cell division, genetic material will pass on to the newly formed cells.
2. The cells of an organism within a similar species will not differ structurally and chemically.
3. Energy flows occurs within the cells.