Thin-walled nonflagellate spores are

Options

A. Zoospores
B. Aplanospores
C. Hypnospores
D. Zygospores.

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about thin-walled non-flagellate spores. We need to identify which of the given options fits this description.

2. **Analyzing the Options**:
- **Zoospores**: These are motile asexual spores that use flagella for movement. Therefore, they are not non-flagellate.
- **Aplenospores**: These are non-motile, thin-walled asexual spores. They are formed from a part of the protoplast of a vegetative cell and are non-flagellate.
- **Hypnospores**: These are thick-walled aplenospores, which means they do not fit the thin-walled criteria.
- **Zygospores**: These are thick-walled spores that arise from the fusion of similar gametes, and they do not fit the thin-walled description.

3. **Identifying the Correct Answer**: Based on the analysis, aplenospores are the only type that is thin-walled and non-flagellate.

4. **Conclusion**: The correct answer to the question is **aplenospores**.

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