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Bacterial growth is proliferation of bacterium into two daughter cells, in a process called binary fission. Providing no event occurs, the resulting daughter cells are genetically identical to the original cell. Hence, bacterial growth occurs. Both daughter cells from the division do not necessarily survive.
Bacterial growth cycles in a growth curve consist of four phases: lag, exponential (log), stationary, and death.
Bacteria divide and reproduce asexually. Binary Fission and everything is equally divided between the two daughter cells.

Time it takes for a single cell to go from one division to the next: generation time or doubling time. This is also the time it takes for a population to double. For many "typical" bacteria under "ideal" conditions this doubling time may be as fast as 20 minutes.