Question

Eye of the molluscan group that resembles vertebrate eye is

• A. bivalvia
• B. gastropoda
• C. pelecypoda
• D. cephalopoda.

Answer 1

The Correct Option is D

The question asks about the molluscan group whose eye resembles that of vertebrates. Let's evaluate the options:

1. Bivalvia: This group includes clams, oysters, and mussels. They typically have simple sensory organs and do not possess advanced eyes like vertebrates.
2. Gastropoda: This group includes snails and slugs. While some gastropods have simple eyes, they do not have the complex eye structure seen in vertebrates.
3. Pelecypoda: This is another term for bivalves, thus similar to option 1. Their eye structure is not comparable to that of vertebrates.
4. Cephalopoda: This group includes octopuses, squids, and cuttlefish. Cephalopods have highly developed eyes that are similar in structure and function to vertebrate eyes, including features like a lens, retina, and iris.

The correct answer is cephalopoda because their eyes are known for their complexity and structural resemblance to vertebrate eyes, despite arising through convergent evolution.