Question

Match List I with List II :

List I                 List II
A. Molluscs            I. Pulmonary respiration only
B. Reptiles            II. Branchial respiration
C. Adult amphibians    III. Cellular respiration
D. Amoeba              IV. Pulmonary and Cutaneous respiration

Choose the correct answer from the options given below :

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

Hint:

Logic Tip: "Branchial" = Gills (Aquatic Molluscs/Fishes). "Pulmonary" = Lungs (Reptiles/Mammals). "Cutaneous" = Skin (Earthworms/Amphibians).

Answer 1

The Correct Option is D

Step 1 : Understanding the Question:
The objective is to match specific animal groups or organisms with their specialized modes of respiration. This requires knowledge of comparative animal physiology.
Step 2 : Key Formulas and Approach:
Modes of respiration:
1. Branchial: Gills (aquatic).
2. Pulmonary: Lungs (terrestrial).
3. Cutaneous: Skin (moist environment).
4. Direct diffusion: Simple surfaces (unicellular).
Step 3 : Detailed Explanation:

Molluscs (A): Most aquatic molluscs possess feather-like gills (ctenidia) in the mantle cavity for gas exchange. Respiration through gills is called branchial respiration. Thus, A matches with II.

Reptiles (B): Reptiles are terrestrial vertebrates with scaly skin. They breathe primarily through well-developed lungs. Thus, they use pulmonary respiration only. Thus, B matches with I.

Adult Amphibians (C): Frogs are unique because they can breathe through lungs (pulmonary) on land and through their moist skin (cutaneous) both on land and in water. Thus, C matches with IV.

Amoeba (D): Being a unicellular organism, Amoeba lacks specialized respiratory organs. Gas exchange occurs directly across the body surface into the cell via diffusion. This is associated with basic cellular respiration processes. Thus, D matches with III.

Step 4 : Final Answer:
The correct matching sequence is A-II, B-I, C-IV, and D-III. This matches the arrangement in option (D).