What is the smallest unit of classification that represents interbreeding groups?

What is the smallest unit of classification that represents interbreeding groups?

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

Answer: (B)

Species are the smallest unit of classification that represents interbreeding groups because individuals within a species can mate and produce viable, fertile offspring, while members of different species are reproductively isolated from each other. This idea is the basis of the biological species concept. The genus groups related species, not necessarily capable of interbreeding with each other; the family and order are broader categories that include many genera or species.

Species are the smallest unit of classification that represents interbreeding groups because individuals within a species can mate and produce viable, fertile offspring, while members of different species are reproductively isolated from each other. This idea is the basis of the biological species concept. The genus groups related species, not necessarily capable of interbreeding with each other; the family and order are broader categories that include many genera or species.