Unthickened area in secondary wall is called

Options

A. stome
B. torus
C. pit
D. plasmodesma

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the term that describes the unthickened area in the secondary wall of plant cells.

2. **Identifying Key Terms**: In plant cell biology, the secondary wall is a layer that forms inside the primary cell wall and is often thickened. However, there are areas within this wall that remain unthickened.

3. **Recognizing the Structure**: The unthickened areas in the secondary wall are known as **plasmodesmata**. These are microscopic channels that traverse the cell walls of plant cells, allowing for communication and transport between adjacent cells.

4. **Function of Plasmodesmata**: Plasmodesmata facilitate the movement of substances and signals between cells, creating a cytoplasmic connection that is essential for the plant's overall functioning.

5. **Conclusion**: Based on the information gathered, the unthickened area in the secondary wall is called **plasmodesmata**.

**Final Answer**: The unthickened area in the secondary wall is called **plasmodesmata**.

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