The diatoms do not easily decay like most o of the other algae because

Options

A. They have waterproof cells
B. Their walls are mucilagenous
C. They have highly siliceous wall
D. They are non-living

Answer

**Step-by-Step Solution:**

1. **Understanding Diatoms**: Diatoms are a type of algae that belong to the kingdom Protista. They are classified under the group called Chrysophytes.

2. **Cell Structure**: The key feature of diatoms is their unique cell wall structure. Unlike many other algae, diatoms have cell walls that are highly resistant to decay.

3. **Composition of Cell Walls**: The cell walls of diatoms are primarily composed of silica (SiO2), which is a very hard and durable material. This silica composition makes their walls indestructible.

4. **Comparison with Other Algae**: Most other algae have softer, more easily degradable cell walls. This is why they tend to decay more quickly in the environment compared to diatoms.

5. **Conclusion**: Because of their highly siliceous walls, diatoms do not easily decay, making option C the correct answer to the question.

**Final Answer**: The diatoms do not easily decay like most of the other algae because they have highly siliceous walls.

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