Which naming system uses two words to name organisms?

Which naming system uses two words to name organisms?

• A. Binomial nomenclature
• B. Monomial nomenclature
• C. Polynomial nomenclature
• D. Ternomial nomenclature

Answer: (A)

Two-word naming for organisms is binomial nomenclature. This system gives each species a genus name followed by a species epithet, typically in Latin and italicized, with the genus capitalized and the species not. It standardizes names across languages and regions, so Homo sapiens, for example, refers to the same organism everywhere. The other options describe naming schemes that would use only one word, three words, or many words, which aren’t used for standard scientific names today—monomial would be a single term, ternomial would be three terms, and polynomial forms are historical and unwieldy. The two-word format precisely identifies both the genus and the species, making it the accepted method.

Two-word naming for organisms is binomial nomenclature. This system gives each species a genus name followed by a species epithet, typically in Latin and italicized, with the genus capitalized and the species not. It standardizes names across languages and regions, so Homo sapiens, for example, refers to the same organism everywhere. The other options describe naming schemes that would use only one word, three words, or many words, which aren’t used for standard scientific names today—monomial would be a single term, ternomial would be three terms, and polynomial forms are historical and unwieldy. The two-word format precisely identifies both the genus and the species, making it the accepted method.