In the binomial naming system, which two taxonomic levels are used in the scientific name?

In the binomial naming system, which two taxonomic levels are used in the scientific name?

• A. Species and Cultivar
• B. Genus and Species
• C. Family and Genus
• D. Order and Family

Answer: (B)

The two-part structure comes from genus and species epithet. The genus groups closely related species, while the species epithet identifies the exact species within that genus. Put together, they create a unique, universally recognized name for a species. For example, Solanum lycopersicum names the tomato species with Solanum as the genus and lycopersicum as the species epithet. Cultivar names are additional designations for cultivated varieties and are not part of the two-term binomial itself, though they can follow the scientific name to specify a particular cultivar (e.g., Solanum lycopersicum 'Brandywine'). The genus–species combination is what uniquely identifies a species, whereas other pairings like genus with family or order with family do not provide that specific two-term identifier.

The two-part structure comes from genus and species epithet. The genus groups closely related species, while the species epithet identifies the exact species within that genus. Put together, they create a unique, universally recognized name for a species. For example, Solanum lycopersicum names the tomato species with Solanum as the genus and lycopersicum as the species epithet. Cultivar names are additional designations for cultivated varieties and are not part of the two-term binomial itself, though they can follow the scientific name to specify a particular cultivar (e.g., Solanum lycopersicum 'Brandywine'). The genus–species combination is what uniquely identifies a species, whereas other pairings like genus with family or order with family do not provide that specific two-term identifier.