Question

Match List-I with List-II

Choose the correct answer from the options given below:

• A. (A)-(I), (B)-(II), (C)-(III), (D)-(IV)
• B. (A)-(IV), (B)-(I), (C)-(II), (D)-(III)
• C. (A)-(I), (B)-(III), (C)-(IV), (D)-(II)
• D. (A)-(III), (B)-(IV), (C)-(I), (D)-(II)

Hint:

Phyllosoma = Lobster (Leaf-like). Glochidium = Mussel (Parasitic). Megalopa = Crab. These three are the most frequently asked larval stages in competitive exams.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Shellfish (crustaceans and molluscs) undergo complex metamorphic stages during their development. Each group has a characteristic larval name.
Detailed Explanation:
1. Crab: Marine crabs typically hatch as Zoea, which then metamorphose into the post-larval Megalopa stage before becoming juveniles. (A-IV)
2. Lobster: Spiny lobsters have a very distinct, leaf-like, transparent larval stage called the Phyllosoma. (B-I)
3. Scampi (Macrobrachium rosenbergii): The freshwater prawn hatches as a Zoea (specifically, it goes through 11 zoeal stages). (C-II)
4. Freshwater Mussel: These molluscs have a parasitic larval stage called Glochidium, which must attach to the gills or fins of a host fish to complete its development. (D-III)
Matching these gives: A-IV, B-I, C-II, D-III.

Step 2: Final Answer:
The correct match is provided in Option (B).