Question

some organisms that share a common ancestor have features that have different functions, but similar structures. these are known as
a vestigial structures.

b analogous structures.

c homologous structures.

d remnant structures.

Explanation:

To solve this, we analyze each option:

• Option A: Vestigial structures are remnants of organs that had a function in ancestors but are now non - functional or reduced, so not matching.
• Option B: Analogous structures are similar in function but different in origin (no common ancestor), so not matching.
• Option C: Homologous structures are features in organisms with a common ancestor, having similar structure but different functions (due to adaptation to different environments), which matches the description.
• Option D: "Remnant structures" is not a standard term for this concept, and vestigial structures are a type of remnant but the description here is about structures with different functions from a common ancestor, not non - functional remnants.

Answer:

C. homologous structures