Ammonotelic animals are predominantly

Options

A. aerial
B. aquatic
C. parasitic
D. terrestrial

Answer

### Step-by-Step Solution:

1. **Understanding Ammonotelic Animals**: Ammonotelic animals are those that primarily excrete ammonia (NH3) as their nitrogenous waste. This is a key characteristic of these animals.

2. **Properties of Ammonia**: Ammonia is highly toxic and requires a significant amount of water for its excretion. This is crucial because it influences the habitat of these animals.

3. **Habitat Consideration**: Given the need for ample water to dilute ammonia and facilitate its excretion, ammonotelic animals are predominantly found in aquatic environments. This includes various species such as protozoans, crustaceans, platyhelminthes, cnidarians, and many fish.

4. **Comparison with Other Animal Types**:
- **Aerial Animals**: Birds and other aerial animals typically excrete uric acid, making them uricotelic, not ammonotelic.
- **Terrestrial Animals**: These animals usually excrete urea or uric acid, which are less toxic and require less water compared to ammonia.
- **Parasitic Animals**: Many parasitic animals have reduced or absent excretory systems, and their nitrogenous waste management can vary widely.

5. **Conclusion**: Based on the above considerations, the predominant habitat of ammonotelic animals is aquatic.

### Final Answer:
Ammonotelic animals are predominantly **aquatic**.

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