What term describes a group of similar organisms that can breed and produce fertile offspring?

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

Answer: (A)

Think of a species as a natural reproductive unit. A group of organisms is a species when its members can mate and produce offspring that can themselves reproduce. This shared gene pool keeps the group genetically cohesive and distinguishes it from other groups. Higher taxonomic levels like genus or family describe related groups, not reproductive unity. A population is simply members of a species living in a particular area, and doesn’t by itself define interbreeding with others. Real-world exceptions exist (such as asexual reproducers or sterile hybrids), but the standard idea centers on the ability to produce fertile offspring.