Before meiosis the microporocyte become surrounded by a thickening of

Options

A. Lignin
B. Suberin
C. Hemicellulose
D. Callose

Answer

**Step-by-Step Solution:**

1. **Understanding Microporocyte**: A microporocyte is a type of cell found in the anther of flowering plants that undergoes meiosis to produce microspores, which eventually develop into pollen grains.

2. **Identifying the Surrounding Structure**: Before meiosis occurs, the microporocyte is surrounded by a protective layer. This layer is crucial for the protection and development of the microspores.

3. **Recognizing the Correct Term**: The thickening that surrounds the microporocyte before meiosis is known as callus. Callus is a polysaccharide that provides structural support and protection.

4. **Eliminating Incorrect Options**:
- Lignin is a complex organic polymer found in the cell walls of many plants, but it does not specifically surround microporocytes.
- Suberin is a waxy substance found in the cell walls of corky tissues, which is also not relevant here.
- Hemicellulose is another component of plant cell walls but does not specifically refer to the structure surrounding microporocytes.

5. **Conclusion**: The correct answer is that before meiosis, the microporocyte becomes surrounded by callus.

**Final Answer**: Callus

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