Excretory product of birds and reptiles is

Options

A. Urea
B. Uric acid
C. Ammonia
D. Guano

Answer

**Step-by-Step Solution:**

1. **Understanding Excretory Products**: Begin by recognizing that different organisms excrete different types of nitrogenous wastes based on their habitat and physiological needs.

2. **Types of Nitrogenous Wastes**: Identify the three main types of nitrogenous wastes:
- **Ammonia**: Commonly excreted by aquatic animals due to the abundance of water.
- **Urea**: Excreted by terrestrial animals like humans, requiring less water than ammonia.
- **Uric Acid**: Excreted by birds, reptiles, and insects, which requires even less water.

3. **Focus on Birds and Reptiles**: The question specifically asks about the excretory products of birds and reptiles. Both of these groups are adapted to conserve water, which is crucial for their survival in terrestrial environments.

4. **Conclusion**: Birds and reptiles primarily excrete uric acid. This is an adaptation that allows them to minimize water loss, as uric acid is excreted in a paste-like form, which is less toxic and conserves water.

5. **Final Answer**: Therefore, the excretory product of birds and reptiles is **uric acid**.

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