Question

Match the animals in Group I with the major form of excreted nitrogen metabolite in Group II. \[ \begin{array}{c|c} \text{Group I} & \text{Group II} \\ \hline P:\; \text{Bony fishes} & 3:\; \text{Ammonia} \\ Q:\; \text{Lions} & 1:\; \text{Urea} \\ R:\; \text{Birds} & 2:\; \text{Uric acid} \\ \end{array} \]

• A. P-3, Q-1, R-2
• B. P-1, Q-2, R-3
• C. P-2, Q-3, R-1
• D. P-3, Q-2, R-1

Hint:

Remember: Fish = ammonia, Mammals = urea, Birds/Reptiles = uric acid.

Answer 1

The Correct Option is A

Step 1: Recall nitrogenous waste types.
- Ammonotelic animals: Excrete ammonia (aquatic animals like bony fishes).
- Ureotelic animals: Excrete urea (mammals like lions).
- Uricotelic animals: Excrete uric acid (birds and reptiles).
Step 2: Match each.
- Bony fishes → Ammonia (3).
- Lions → Urea (1).
- Birds → Uric acid (2).
Final Answer: \[ \boxed{P-3,\; Q-1,\; R-2} \]