Characteristics spores of diatoms are

Options

A. Ascospores
B. Basidiospores
C. Auxospores
D. Zoospores.

Answer

### Step-by-Step Solution:

1. **Understanding Diatoms**: Diatoms are unicellular eukaryotic organisms that belong to the kingdom Protista. They are known for their unique silica cell walls and play a significant role in aquatic ecosystems.

2. **Identifying Spores**: Diatoms produce different types of spores, but the question specifically asks about the characteristics of the spores associated with diatoms.

3. **Types of Spores**: The options provided include:
- Esospores
- Basidiospores
- Auxospores
- Zoospores

4. **Analyzing Each Option**:
- **Esospores**: These are reproductive spores produced by fungi, specifically in the class Ascomycetes. They are not related to diatoms.
- **Basidiospores**: These are also reproductive spores produced by fungi, specifically in the class Basidiomycetes. Again, not related to diatoms.
- **Zoospores**: These are motile spores produced by some algae, fungi, and bacteria. They are asexual and do not pertain to the reproductive cycle of diatoms.
- **Auxospores**: These are special spores formed by diatoms that serve the purpose of restoring the maximum size and characteristic shape of the diatom after cell division.

5. **Conclusion**: The correct answer is **Auxospores**, as they are specifically involved in the regeneration of size and shape in diatoms.

### Final Answer:
The characteristics spores of diatoms are **Auxospores**.

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