All living organisms possess the capacity of cell division.
Cell division by mitosis can be a reproductive division in living organisms.
How is division of labour done in the cells of living organisms
1. what do you mean "in vitro" ? specifically on sentences"Cell division occurs in certain tissues to replace lost cells.Unicellular organisms grow by cell division .One can easily observe this in IN VITRO cultures by simply counting the number of cells under microscope".
And on sentence "Metabolism is a defining feature of all living organisms without exception ,isolated metabolic reactions IN VITRO are not living things but surely living reactions."