Question

if two individuals can mate and produce fertile offspring, they belong to the same ------. gradualism population species punctuated equilibrium

Explanation:

The biological species concept defines a group of organisms that can interbreed in nature and produce fertile, viable offspring. The other terms refer to evolutionary rate theories (Gradualism, Punctuated equilibrium) or a group of organisms in a geographic area (Population), which do not fit the definition provided.

Answer:

Species