One important part of the cell theory is that all cells originate from other cells. however, the cell theory could not have been authored, without the knowledge from a prior experiment in the 1600's. in it, francisco redi, proved that rotting meat did not alone give rise to maggots. redi proved that all life had to come from the same previous life form. redi disproved the idea that a) all cells come from other cells. b) asexual reproduction is possible. c) life could arise by spontaneous generation. d) the most basic unit of life is a single cell.