Which term denotes a reproductively isolated, interbreeding group of organisms?

Which term denotes a reproductively isolated, interbreeding group of organisms?

• A. Species
• B. Reproductive variance
• C. Cladistics
• D. Biological species concept

Answer: (D)

Defining a reproductively isolated, interbreeding group is captured by the Biological Species Concept. This idea says that a species is a population or group of natural populations that can interbreed to produce viable, fertile offspring and are reproductively isolated from other such groups. That makes it the best answer because it directly ties interbreeding capability and reproductive isolation to how we recognize and delineate species in nature, rather than just naming a unit or focusing on traits or analysis methods. The term “species” refers to the unit itself but doesn’t specify how it’s defined; “reproductive variance” isn’t a standard concept for delimiting groups; and “cladistics” groups organisms by shared derived traits to infer evolutionary relationships, not by reproductive compatibility. So the Biological Species Concept best describes a reproductively isolated, interbreeding group.

Defining a reproductively isolated, interbreeding group is captured by the Biological Species Concept. This idea says that a species is a population or group of natural populations that can interbreed to produce viable, fertile offspring and are reproductively isolated from other such groups. That makes it the best answer because it directly ties interbreeding capability and reproductive isolation to how we recognize and delineate species in nature, rather than just naming a unit or focusing on traits or analysis methods. The term “species” refers to the unit itself but doesn’t specify how it’s defined; “reproductive variance” isn’t a standard concept for delimiting groups; and “cladistics” groups organisms by shared derived traits to infer evolutionary relationships, not by reproductive compatibility. So the Biological Species Concept best describes a reproductively isolated, interbreeding group.