What was Rudolf Virchow's contribution to the cell theory?

A. He concluded that all cells come from preexisting cells.
B. He concluded that cells are the basic units of structure and function of all living things.



Answer :

Final answer:

Rudolf Virchow determined that all cells come from preexisting cells, advancing the cell theory.


Explanation:

Rudolf Virchow's key contribution to the cell theory was that he concluded all cells come from preexisting cells. In 1855, he popularized this concept in an essay titled 'Cellular Pathology,' building on the work of his colleagues.


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