Coelenterates are

Options

A. Ureotelic
B. Uricotelic
C. Ammonotelic
D. None of the above.

Answer

**Step-by-Step Solution:**

1. **Understanding Coelenterates**: Coelenterates, also known as Cnidarians, are primarily aquatic invertebrates. They include organisms such as jellyfish, corals, and sea anemones.

2. **Characteristics of Coelenterates**:
- They exhibit radial symmetry, meaning their body structure is arranged around a central axis.
- They lack a coelom, which is a fluid-filled body cavity found in some other animal groups.

3. **Nitrogenous Waste Excretion**:
- Coelenterates are aquatic organisms, and like many aquatic animals, they excrete ammonia as their primary nitrogenous waste product.
- Ammonia is highly toxic but is diluted easily in water, making it suitable for excretion in an aquatic environment.

4. **Classification of Nitrogenous Waste Excretion**:
- Organisms that excrete ammonia are termed "ammonotelic."
- In contrast, ureotelic organisms (like mammals) excrete urea, and uricotelic organisms (like birds and reptiles) excrete uric acid.

5. **Conclusion**: Since coelenterates excrete ammonia, they are classified as ammonotelic organisms.

**Final Answer**: Coelenterates are ammonotelic organisms.

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