Lignin occurs in the cells walls of

Options

A. phloem
B. cork
C. woody tissue
D. parenchyma

Answer

**Step-by-Step Solution:**

1. **Understanding Cell Walls**: Plant cells have two main types of cell walls: the primary cell wall and the secondary cell wall. The primary cell wall is formed when a cell divides, surrounding the two newly formed cells.

2. **Formation of Secondary Cell Wall**: The secondary cell wall is formed after the cell has completed its growth. It is located between the primary cell wall and the plasma membrane.

3. **Composition of Secondary Cell Wall**: The secondary cell wall is made up of multiple layers, which include cellulose, microfibrils, and lignin.

4. **Identifying Lignin's Role**: Lignin is a complex organic polymer that provides rigidity and strength to the cell walls. It is particularly abundant in certain types of plant cells.

5. **Location of Lignin**: Lignin is predominantly found in the xylem cells, which are responsible for water transport in plants. These cells are heavily lignified, contributing to the woodiness of trees and shrubs.

6. **Conclusion**: Therefore, lignin occurs in the cell walls of xylem cells, which are part of the woody tissue in plants.

**Final Answer**: Lignin occurs in the cell walls of xylem cells (woody tissue).

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