What is the best known living being in the scientific field?

The best known organism in science is certainly a bacterium that lives in the human intestine. Invisible to the naked eye, Escherichia coli is largely responsible for the knowledge of some of the fundamentals of modern biology that have been recognized by several Nobel prizes.  These are the processes of bacterial genetic recombination, RNA transcription, DNA replication and gene regulation. In addition, in recent decades this bacterium has become another tool in the laboratory, especially...
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