Which statement about genus and species is accurate?

• A. The genus is larger than species.
• B. The species is a larger group than genus.
• C. The genus and species refer to the same taxon.
• D. The genus is the group that contains species.

Answer: (D)

In taxonomy, the genus is a rank that groups together one or more closely related species. A species is the basic unit of classification, describing a population that can interbreed and produce fertile offspring. The genus sits above the species in the hierarchy, so it contains one or more species, but a single species is not a container for other species. Therefore, the statement that the genus is the group that contains species accurately reflects this relationship. The other statements misstate the relationship: saying the genus is larger than species isn’t the standard way to describe hierarchy, and saying the species is larger than the genus would imply the opposite. Genus and species do not refer to the same taxon; they refer to different ranks within the same lineage. For example, Homo is the genus that contains the species sapiens, illustrating how the genus groups species together.