Bacterium size is measured by a technique called Micrometry. With micrometry you can measured the size of very small beings like bacteria, cells, etc. This technique involves the use of a microscope in which the eye piece is calibrated in micrometers. A similarly calibrated slide is used for standardization. The specimen is then mounted and the size measured. Normally, the size of many cells are taken into account and an average value is taken, since all cells may not be of the same size.
When people refer to bacteria growth it is actually about the amount of bacterium in a colony rather than the actual size of an individual bacterium increasing. Bacterium reproduce asexually through binary fission. This is when they basically just make a copy of their chromosome and then split. They reproduce sexually through conjunction. This is when they attach to one another using their pili, which are short hairlike structures on the outside of the cell. Through the pili they transfer a copy of a portion of their DNA. They then take on traits of the other cell. This helps to explain how bacterium can pass on drug resistance to one another.Bacteria is every were and you can get sick if you don't dust daily.Read more: How_does_bacteria_grow
A bacterium that needs oxygen is called an aerobic bacterium
Bacterium
about .145 centimeters
biologically yes, grammatically no. Bacterium is the singular form of bacteria.
M=O/A magnification = observed size/actual size
A virus is much much much smaller then a bacterium. Virus called phage can infect bacteria.
Bacteria are all unicelular, but some live in colonies where they actually don't differ that much in cell size. 'Bacteria' is the plural form of 'bacterium'.
0.2 to 5 microns
All bacterium is microscopic.
50-500 nm
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An organism of microscopic or submicroscopic size, especially a bacterium or protozoan.