"Omnis cellula e cellula" term was given by:
1. Scheliden
2.Scheliden &Schwann
3.Schwann
4.Virchow
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was a German biologist , who presented the idea that cells arise from pre - existing cells . He refined the cell theory in 1855 .
His actual aphorism was - " Omnis cellulae a cellula . "
The postulates of cell theory are :
◾ All organisms are composed of cells and cell secretions .
◾ All metabolic reactions take place in cells , so cells are called the structural and functional units of life .
◾ All cells arise from pre - existing cells only . No cell can originate spontaneously but , comes into being only by division of already existing cells .
◾ Every organism starts life as a single cell . [ Viruses are an exception to the cell theory ]
manutiwa:
thanks
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