The cell theory has been proven to be true . The cell theory states that:
1.All living things are made up of one or more cells.
2.All living cells come from pre-existing cells, by division.
3.The cell is the fundamental, structural unit of all living organism.
The organismal theory on the other hand argues that during plant growth/evolution, the original cell expanded into the whole organism. This opposes the 2nd tenet of the cell theory that all living cells come from pre-existing cells by division.