The animal that excretes amino acids without deamination is

Options

A. Rana
B. Unio
C. Earthworm
D. Labeo

Answer

To solve the question "The animal that excretes amino acids without deamination is," we need to analyze the options given: Rana, Uneo, Earthworm, Lamia.

### Step-by-Step Solution:

1. **Understanding Deamination**:
- Deamination is the process of removing the amino group (NH2) from amino acids, which typically converts them into ammonia or other nitrogenous wastes.

2. **Identifying Excretion Mechanisms**:
- Animals can be classified based on their excretion methods:
- **Ureotelic**: Animals that convert ammonia into urea (e.g., humans).
- **Ammonotelic**: Animals that excrete ammonia directly without converting it (e.g., many aquatic organisms).

3. **Analyzing the Options**:
- **Rana (Frog)**: The larvae and tadpoles of frogs (amphibians) are known to be ammonotelic, meaning they can excrete ammonia directly without deamination.
- **Uneo**: This term is not commonly recognized in biological classifications and may refer to a specific organism or group that is not relevant here.
- **Earthworm**: Earthworms are ureotelic, as they convert ammonia into urea.
- **Lamia**: This term may refer to a mythical creature or a specific organism not typically associated with excretion mechanisms.

4. **Conclusion**:
- Since Rana (specifically the tadpoles) can excrete ammonia directly without undergoing deamination, the correct answer is **Rana**.

### Final Answer:
The animal that excretes amino acids without deamination is **Rana**.

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