What naming system uses a two-part scientific name for each species?

• A. Binary Taxonomy
• B. Binomial Nomenclature
• C. Trinomial Nomenclature
• D. Polynomial Nomenclature

Answer: (B)

Binomial nomenclature is the system that gives every species a two-part scientific name. It pairs a genus name with a species epithet to create a unique label, like Homo sapiens. The genus is capitalized, the epithet is lowercase, and the whole name is usually italicized, standardizing names across languages and regions. This approach keeps naming consistent and precise: the genus groups closely related species, while the epithet narrows it to the exact species within that genus. Subspecies use trinomial nomenclature (for example Canis lupus familiaris), and polynomial naming describes long descriptive phrases, not the standard two-part name.