Biological Species Concept

Steps:

• Recall the standard biological definition of a species from evolutionary biology.
• Evaluate each choice against this definition, focusing on reproductive isolation.
• Eliminate options based on shared traits, ecology, or resources, which do not define species boundaries.
• Confirm the choice that matches interbreeding and fertility as the core criterion.

Why C is correct:

• The biological species concept defines a species as a group of organisms that can interbreed in nature and produce viable, fertile offspring, ensuring genetic continuity.

Why the others are wrong:

• A: Shared body features indicate similarity but not reproductive isolation, as seen in convergent evolution.
• B: Common food sources reflect ecological niches, not species identity, like predators sharing prey.
• D: Shared habitat describes a community or ecosystem, not a single species, as multiple species coexist there.

Final answer: C