Before revision: In stable environments, statistics of cell size fluctuations is thought to be governed by simple physical principles . Past studies suggested that bacterial cell sizes exhibit a universal distribution irrespective of growth conditions, and for eukaryotes, a single distribution may describe size fluctuations of various cell species. The distinguished feature of those distributions is scale invariance; i.e., the distribution function is determined solely by the mean cell size.
After revision: In stable environments, statistics of cell size fluctuations is thought to be governed by simple physical principles , as suggested by recent finding of scaling properties.