Which of the following terms describes a group of similar organisms capable of interbreeding?

The term that describes a group of similar organisms capable of interbreeding is "species." In biological classification, a species is the most specific taxonomic rank and refers to a group of individuals that share common characteristics and can produce viable offspring together under natural conditions. This definition emphasizes the potential for reproduction within the group, establishing them as a distinct category in the hierarchy of life.

Genus refers to a rank that includes one or more species that are closely related. While organisms within the same genus share certain traits, they may not always interbreed reliably. The term order is a broader classification that groups together families of organisms, while family encompasses a group of related-genus. These classifications represent higher taxonomic levels above species and do not specifically address the reproductive capabilities that define a species.