What is the simple precursor of the middle lamella?

Answer

**Step-by-Step Text Solution:**

1. **Understanding the Middle Lamella**: The middle lamella is a layer that exists between two adjacent plant cells. It plays a crucial role in holding the cells together and is part of the plant cell wall structure.

2. **Composition of the Middle Lamella**: The middle lamella is primarily composed of pectins, which are polysaccharides. Specifically, it contains calcium and magnesium pectates that help in cementing the cell walls of adjacent cells.

3. **Formation of the Middle Lamella**: During the process of cell division in plants, a structure known as the cell plate forms. This cell plate is crucial for the separation of the two daughter cells.

4. **Cell Plate as a Precursor**: The cell plate is the initial structure that develops during cytokinesis (the final stage of cell division). It forms in the center of the dividing cell and extends outward towards the cell walls.

5. **Transformation into the Middle Lamella**: As the cell plate matures, it undergoes a transformation where materials, including calcium and magnesium pectates, are deposited. This process ultimately leads to the formation of the middle lamella between the two newly formed cells.

6. **Conclusion**: Therefore, the simple precursor of the middle lamella is the cell plate, which is essential for the formation of the intercellular space between two plant cells.

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