Here is something on cyanobacteria showing sleep-like behaviour during which they do not divide. https://phys.org/news/2010-03-cell-division-cyanobacteria-kind

Here is something on cyanobacteria showing sleep-like behaviour during which they do not divide. https://phys.org/news/2010-03-cell-division-cyanobacteria-kind-circadian.html https://phys.org/news/2010-03-cell-division-cyanobacteria-ki...