Which of the following groups contains uricotelic animals only?

Options

A. Reptiles, birds, land snails, insect
B. Reptiles, birds, land snail, aquatic insects
C. Amphibians, birds, lands snails, insects
D. Amphibians, reptiles, birds, insect

Explanation

To determine which group contains only uricotelic animals, we need to understand what uricotelic animals are and identify examples of such animals.

### Step-by-Step Solution:

1. **Define Uricotelic Animals**:
Uricotelic animals are those that excrete nitrogenous waste primarily in the form of uric acid. This adaptation is beneficial for conserving water, making it common in animals that live in arid environments.

2. **Identify Uricotelic Animals**:
Common examples of uricotelic animals include:
- **Reptiles**: Most reptiles excrete uric acid.
- **Birds**: Birds also excrete nitrogenous waste as uric acid.
- **Land Snails**: These mollusks excrete waste in the form of uric acid.
- **Insects**: Many insects are uricotelic as well.

3. **Analyze the Given Groups**:
Now, let's evaluate the groups mentioned in the question:
- **Group 1**: Reptiles, Birds, Land Snails, Insects
- **Group 2**: Aquatic Insects, Amphibians, Birds, Land Snails
- **Group 3**: Amphibians, Reptiles, Birds, Insects

We need to find a group that contains only uricotelic animals.

4. **Evaluate Each Group**:
- **Group 1**: All members (Reptiles, Birds, Land Snails, Insects) are uricotelic.
- **Group 2**: Contains Amphibians, which are not uricotelic (they excrete urea).
- **Group 3**: Contains Amphibians, which are not uricotelic.

5. **Conclusion**:
The only group that contains uricotelic animals exclusively is **Group 1**: Reptiles, Birds, Land Snails, and Insects.

### Final Answer:
The correct option is **Group 1: Reptiles, Birds, Land Snails, and Insects**.

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