Glass sponges belong to ……..class

Options

A. Calcarea
B. Demospongiae
C. Hexactinellida
D. None of these

Answer

**Step-by-Step Solution:**

1. **Identify the Classification Context**: The question asks about the class to which glass sponges belong. To answer this, we need to understand the classification of sponges in the animal kingdom.

2. **Understand the Phylum**: Glass sponges are part of the Phylum Porifera. This phylum includes all sponges, which are simple aquatic animals.

3. **Identify the Classes within Phylum Porifera**: Within the Phylum Porifera, there are three main classes:
- **Calcarea**: Sponges with a body wall made of calcium carbonate.
- **Demospongiae**: Sponges with a body wall made of spongin fibers.
- **Hexactinellida**: This class is characterized by sponges that have silica spicules and often have a six-sided structure.

4. **Determine the Class for Glass Sponges**: Glass sponges are specifically known for their silica spicules, which give them a glass-like appearance. They are classified under the class **Hexactinellida**.

5. **Final Answer**: Therefore, glass sponges belong to the class **Hexactinellida**.

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