Public Health Sanitarian Practice Test

Question: 1 / 400

The second word in the scientific name of a microorganism indicates what classification level?

Genus

Species

In the binomial nomenclature system, which is used to scientifically name organisms, the second word in a microorganism's scientific name signifies the species level of classification. This system was developed by Carl Linnaeus and is universally used in biological taxonomy.

The first word of the name indicates the genus, while the second word defines the specific species within that genus. For example, in the name *Escherichia coli*, "Escherichia" is the genus, and "coli" refers specifically to the species. This hierarchical structure is crucial as it allows scientists and researchers to accurately identify and classify organisms, facilitating better communication regarding species across different disciplines and languages.

Understanding this classification helps in fields like microbiology, medicine, and public health, where precise identification of microorganisms is essential for study, diagnosis, treatment, and control of diseases.

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