Two animals in which the nitrogenous wastes are excreted from body in the from of uric acid are

Options

A. Birds and lizards
B. Frogs and cartilaginous fishes
C. Insects and bony fishes
D. Mammals and mollusc

Answer

To answer the question regarding two animals that excrete nitrogenous wastes in the form of uric acid, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Nitrogenous Wastes**: Nitrogenous wastes are byproducts of protein metabolism, and they can be excreted in different forms: ammonia, urea, or uric acid. The form in which these wastes are excreted depends on the organism's habitat and evolutionary adaptations.

2. **Identify Excretion Types**:
- **Ammonotelic**: Organisms that excrete ammonia (e.g., many aquatic animals).
- **Ureotelic**: Organisms that excrete urea (e.g., mammals and amphibians).
- **Uricotelic**: Organisms that excrete uric acid (e.g., birds and reptiles).

3. **Focus on Uric Acid Excretion**: Since the question specifically asks for animals that excrete uric acid, we need to identify examples of uricotelic organisms.

4. **List Examples**:
- **Birds**: Birds are well-known for excreting uric acid as it allows them to conserve water, which is crucial for their survival in various habitats.
- **Reptiles**: Many reptiles, including lizards, also excrete uric acid. This adaptation helps them survive in arid environments.

5. **Conclude with Specific Examples**: Therefore, two animals that excrete nitrogenous wastes in the form of uric acid are:
- **Birds** (e.g., sparrows, eagles)
- **Lizards** (a type of reptile)

### Final Answer:
The two animals that excrete nitrogenous wastes in the form of uric acid are **birds** and **lizards**.

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