Bacteria are single cell organisms some of which have a diameter of 0.0003 mm.
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The discovery of a virus called "mimivirus" in 1992 complicates the placement of viruses in the overall classification scheme for living organisms. Prior to this discovery, viruses were generally considered nonliving until they hijack a living cell. Officially, this virus got its name because it mimics bacteria (microbes) in size and complexity. It was placed in a new family of viruses, the Mimiviridae. Mimivirus was found inside an amoeba within a cooling tower in Bradford, UK. [The cooling tower was being investigated as the source of an influenza outbreak.] Mimivirus is the largest known virus, about 0.8 micrometers (800 nanometers) across. In fact it is larger than the bacterium causing gonorrhea.
Answer:
which is 3×10^-4
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