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Point Mutations
Much like humans, bacteria are subject to evolution. Evolution occurs through beneficial mutations in the DNA. Because bacteria have much shorter generation times than humans, the process of evolution occurs much more rapidly. An example of how bacteria evolve through mutation is point mutation.
Point mutation is the random mutation of DNA nucleotides [...]
Only a tiny amount of bacteria found on Earth are actually associated with disease. The number associated with human disease is as low as 0.001%. Bacteria are extremely small when compared to humans, for example the width of an average bacterium is often no greater than 1.5μm.
