Question

1. what major idea did rudolf virchow contribute to cell theory?

cells can live forever
cells dont have any internal parts
all cells come from pre - existing cells
cells are made of plant fibers

Explanation:

Rudolf Virchow's contribution to cell theory is the idea that all cells come from pre - existing cells. This was an important addition to the cell theory. Cells do not live forever (they have life cycles), cells have internal parts (organelles), and cells are not made of plant fibers (plant cells have cell walls made of cellulose but cells in general are complex structures with various components).

Answer:

All cells come from pre - existing cells.