The observation that there is a limit to how many times a cell can divide is the basis for the replicative theory of senescence.
The mechanism of a replicative theory of senescence is thought to involve some type of clock called the biological clock within the cell, which measures the number of cellular divisions within a cell and signals the cell to discontinue division at some genetically predetermined time. Most cells cannot divide indefinitely due to a process termed cellular or replicative senescence.
Cellular division or cell division is a process by which a parent cell further divides when a mother cell divides into two or many daughter cells.
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