Which of the following are uricotelic ?

Options

A. Fishes and amphibians
B. Amphibians and reptiles
C. Reptiles and birds
D. Birds and mammals

Answer

To determine which organisms are uricotelic, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Classification of Organisms Based on Nitrogenous Waste:**
- Organisms are classified into three categories based on the form of nitrogenous waste they excrete:
- **Ammonotelic:** Excrete ammonia (e.g., many aquatic organisms).
- **Ureotelic:** Excrete urea (e.g., mammals, including humans).
- **Uricotelic:** Excrete uric acid (e.g., reptiles and birds).

2. **Identify Uricotelic Organisms:**
- Uricotelic organisms are those that primarily excrete uric acid as their nitrogenous waste.
- Common examples of uricotelic organisms include:
- **Reptiles:** Such as lizards, snakes, and turtles.
- **Birds:** All species of birds excrete uric acid.

3. **Conclusion:**
- Based on the classification, the organisms that are uricotelic are reptiles and birds.

### Final Answer:
The organisms that are uricotelic are **reptiles and birds**.

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