Why is cell theory a theory and not a law?

The cell theory is a theory and not a law because it always has information added to it so it is ever-changing. Once a theory is a theory, it cannot become a law.

What is the difference between cytokinesis in plant and animal cells? animal cells dived by a cleavage furrow. plant cells divide by a cell plate that eventually becomes the cell wall. cytoplasm and cell membranes are necessary for cytokinesis in both plant and animals.