Which of the following animals are not uricotelic?

Options

A. Reptiles and birds
B. Birds and land snails
C. Land snails and terrestrial insects
D. Aquatic insects and marine fishes

Answer

To determine which of the following animals are not uricotelic, we need to understand what uricotelic means. Uricotelic organisms excrete nitrogenous waste primarily in the form of uric acid.

### Step-by-Step Solution:

1. **Define Uricotelic**:
- Uricotelic organisms are those that excrete nitrogenous waste as uric acid. This is common in reptiles, birds, and some terrestrial snails and insects.

2. **Identify the Options**:
- The options provided are:
1. Reptiles and birds
2. Land snails
3. Terrestrial insects
4. Aquatic insects and marine species

3. **Analyze Each Option**:
- **Option 1: Reptiles and Birds**:
- Both of these groups are uricotelic as they excrete waste in the form of uric acid.
- **Option 2: Land Snails**:
- Land snails are also uricotelic, excreting waste as uric acid.
- **Option 3: Terrestrial Insects**:
- Terrestrial insects are likewise uricotelic, excreting uric acid.
- **Option 4: Aquatic Insects and Marine Species**:
- These organisms are not uricotelic; instead, they are ammonotelic, meaning they excrete nitrogenous waste as soluble ammonia.

4. **Conclusion**:
- Since options 1, 2, and 3 are all uricotelic, the animals that are not uricotelic are found in **Option 4: Aquatic insects and marine species**.

### Final Answer:
The animals that are not uricotelic are **aquatic insects and marine species**.

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