This document discusses various methods of bacterial reproduction and measurement. It describes how some bacteria reproduce through binary fission, where a cell divides into two daughter cells of equal size. It also discusses unusual reproduction patterns in some cyanobacteria, where a spherical baeocyte cell grows large and then rapidly divides into dozens of baeocytes. Some bacteria reproduce through budding, where a protrusion forms on the parent cell and eventually separates. Additionally, some Firmicutes reproduce by forming multiple offspring cells intracellularly. The document also outlines various methods to measure bacterial cell mass, including direct measurement of dry weight and indirect measurement of chemical activity. It describes techniques to count bacterial cell numbers, such as direct microscopic counting and the plate method.