When they reach size limitations....they divide by binary fission or any other process of reproduction !
second may be they stop division and stay at their state as happens in ovum of the female as they stops in diakinesis !!!
The main function of the smooth ER is to make hormones and lipids.
The phosphorus cycle does not include an atmospheric component because phosphorus does not cycle through the atmosphere. In comparison, important processes of the carbon and nitrogen cycle occur in the atmosphere.
