Eye of which molluscan group resembles vertebrate eye?

Options

A. Bivalvia
B. Gastropoda
C. Pelecypoda
D. Cephalopoda

Explanation

**Step-by-Step Text Solution:**

1. **Understanding Molluscan Groups**: First, we need to identify the major groups within the phylum Mollusca. The main classes include Gastropoda (snails and slugs), Bivalvia (clams and oysters), Cephalopoda (squids and octopuses), and others.

2. **Identifying the Eye Structure**: The eyes of mollusks vary significantly among the different classes. For instance, Gastropods have simple eyes, while Bivalves typically lack complex eyes altogether.

3. **Focusing on Cephalopods**: Among the molluscan groups, the Cephalopoda class is known for its advanced nervous system and complex behaviors. This group includes squids, octopuses, and cuttlefish.

4. **Comparing with Vertebrate Eyes**: The eyes of cephalopods, particularly octopuses, have a structure that is remarkably similar to vertebrate eyes. Both have a lens, retina, and cornea, and they function similarly in terms of image formation.

5. **Conclusion**: Therefore, the molluscan group whose eye resembles that of vertebrates is the Cephalopoda.

**Final Answer**: The eye of the Cephalopoda group resembles the vertebrate eye.

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