The microbial growth curve depicts the lag phase, logarithmic phase, stationary phase, and decline (or exponential death) phase. During the lag phase, there is no cell division. Cells spend this time adapting to the environment. The logarithmic phase is the active phase in which cell division (binary fission) is occuring exponentially. During the stationary phase, the reproductive and death rates equalize. In other words, bacterial reproduction is occuring at the same rate as bacterial decline. Finally, during the decline phase, the number of dying cells exceeds the number of cells formed. However, some cells still remain viable. Hence, not all cells have died.