The precursor for the formation of this layer of the cell walls cell plate

Options

A. Primary wall
B. Middle lamellum
C. Secondary wall
D. Tertiary wall

Answer

To answer the question regarding the precursor for the formation of the cell wall layer known as the cell plate, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Cell Plate**:
- The cell plate is formed during the process of cytokinesis in plant cells. It is crucial for the separation of two daughter cells after mitosis.

2. **Identifying the Layers of the Cell Wall**:
- The cell wall of plants consists of several layers, primarily:
- Primary wall
- Middle lamella
- Secondary wall
- Tertiary wall

3. **Analyzing the Options**:
- **Option 1: Primary Wall**: This is incorrect because the primary wall is formed during cell growth and is not directly formed from the cell plate.
- **Option 2: Middle Lamella**: This is the correct answer. The middle lamella is the layer that forms between the two daughter cells and is derived from the cell plate. It acts as a cementing layer that holds the cells together.
- **Option 3: Secondary Wall**: This is incorrect because the secondary wall forms inside the primary wall and does not originate from the cell plate.
- **Option 4: Tertiary Wall**: This is also incorrect as the tertiary wall is a thin layer that does not contain cellulose microfibrils and is composed of other substances like xylene and lignin.

4. **Conclusion**:
- Based on the analysis, the cell plate serves as the precursor for the formation of the **middle lamella**.

### Final Answer:
The precursor for the formation of the layer of the cell wall known as the cell plate is the **Middle Lamella**.

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