Which of the following group of animals are ammonotelic in nature ?

Options

A. Many bony fishes, amphibians, Insects.
B. Marine fishes, amphibians, aquatic insects
C. Mammals, birds, reptiles
D. Many bony fishes, aquatic amphibians, aquatic insects.

Answer

To determine which group of animals are ammonotelic in nature, we need to understand what ammonotelism means and identify the animals that fit this category.

### Step-by-Step Solution:

1. **Understanding Ammonotelism**:
- Ammonotelism is the excretion of nitrogenous waste primarily in the form of ammonia (NH3). This process requires a large amount of water, as ammonia is highly toxic and needs to be diluted to be safely excreted.

2. **Identifying Characteristics of Ammonotelic Animals**:
- Animals that are ammonotelic typically live in environments where water is abundant, such as freshwater habitats. This allows them to excrete ammonia without the risk of toxicity.

3. **Examples of Ammonotelic Animals**:
- Common examples include:
- **Bony Fish**: These fish live in freshwater and excrete ammonia directly into the water.
- **Aquatic Amphibians**: Such as frogs, which also have access to plenty of water.
- **Aquatic Insects**: Certain insects that live in water bodies and can afford to lose large amounts of water.

4. **Analyzing the Options**:
- Given the options provided:
- **Bony Fishes**: Ammonotelic
- **Aquatic Amphibians**: Ammonotelic
- **Aquatic Insects**: Ammonotelic
- **Marine Fishes**: Not ammonotelic (they excrete urea)
- **Reptiles and Birds**: Not ammonotelic (they excrete uric acid)

5. **Conclusion**:
- The correct group of animals that are ammonotelic in nature includes **Bony Fishes, Aquatic Amphibians, and Aquatic Insects**.

### Final Answer:
The group of animals that are ammonotelic in nature includes **Bony Fishes, Aquatic Amphibians, and Aquatic Insects**.

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