What is a cell|cell theory

What does the cell theory state ?

Cell theory given by Schleiden and Schwann was incomplete because there was no explanation about the foramtion of new cell . This aspect of cell theory was completer by

Define cell theory

Cell theory which was given by Schleiden and Schwann, did not explain as to how the new cells are formed? ................ modified the hypothesis of cell theory to give it a final shape ?

Who proposed a modification in the cell theory ?

Who gave the cell theory a final shape?