which of the following part of dicot root is made up of cells with suberin depostion in tangential as well as radial walls.

Options

A. epidermis
B. endodermis
C. cortex
D. pericycle.

Answer

To solve the question regarding which part of the dicot root is made up of cells with suberin deposition in both tangential and radial walls, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of Dicot Roots**:
- Dicot roots have several layers, including the epidermis, cortex, endodermis, and pericycle. Each layer has distinct characteristics.

2. **Identify the Role of Suberin**:
- Suberin is a waxy substance that is deposited in the cell walls of certain plant cells, providing protection and preventing water loss.

3. **Focus on the Endodermis**:
- The endodermis is a single layer of cells that surrounds the vascular tissue in the root. It is known for having specialized cells that are barrel-shaped and thick-walled.

4. **Recognize the Casparian Bands**:
- The endodermis contains Casparian bands (or thickenings) that are composed of lignin and suberin. These bands are found in both the tangential and radial walls of the endodermal cells.

5. **Eliminate Other Options**:
- The epidermis does not have suberin deposition in the same manner as the endodermis.
- The cortex is primarily involved in storage and does not have the same structure as the endodermis.
- The pericycle is involved in lateral root formation and does not have significant suberin deposition.

6. **Conclusion**:
- Based on the characteristics of the layers and the presence of suberin in the tangential and radial walls, the correct answer is the **endodermis**.

### Final Answer:
The part of the dicot root that is made up of cells with suberin deposition in tangential as well as radial walls is the **endodermis**.

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