Which statement about scientific names is true?

Which statement about scientific names is true?

• A. They are always written in two parts: genus and species.
• B. They are always written with the family name.
• C. They are always written with the genus name first and the species name second.
• D. They must be in all caps.

Answer: (A)

Two-part naming is the hallmark of scientific nomenclature. Each species is identified by a genus name, which groups related organisms, followed by a species epithet that specifies the exact species within that genus. The genus is capitalized, the species epithet is lowercase, and the whole name is usually written in italics. This two-part structure is the defining feature you should recognize. While there can be a subspecies added as a third word in some contexts, the basic name remains two parts. The other statements don’t fit: a family name isn’t included in the binomial name, and names are not written in all caps; the order is inherently genus first and species second because of the two-part format.

Two-part naming is the hallmark of scientific nomenclature. Each species is identified by a genus name, which groups related organisms, followed by a species epithet that specifies the exact species within that genus. The genus is capitalized, the species epithet is lowercase, and the whole name is usually written in italics. This two-part structure is the defining feature you should recognize. While there can be a subspecies added as a third word in some contexts, the basic name remains two parts. The other statements don’t fit: a family name isn’t included in the binomial name, and names are not written in all caps; the order is inherently genus first and species second because of the two-part format.