Water impermeable, waxy material suberin in the form of strips is present in the

Options

A. Root epidermis
B. Root endodermis
C. Stem epidermis
D. Stem endodermis

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the presence of a water impermeable, waxy material called suberin in the form of strips.

2. **Identifying the Material**: The material mentioned, suberin, is known for its water-repellent properties. It is commonly found in certain plant tissues.

3. **Recognizing the Structure**: The strips of suberin referred to in the question are specifically known as Casparian strips. These are bands of cell wall material that contain suberin and sometimes lignin.

4. **Locating the Casparian Strips**: Casparian strips are primarily found in the endodermis of roots. The endodermis is the innermost layer of the cortex in roots and plays a crucial role in regulating the flow of water and nutrients.

5. **Evaluating the Options**:
- Root epidermis: This layer does not contain Casparian strips.
- Root endodermis: This is where the Casparian strips are located.
- Stem epidermis: This layer does not contain Casparian strips.
- Stem endodermis: While there may be some similar structures, the classic Casparian strips are primarily associated with roots.

6. **Conclusion**: Based on the information, the correct answer to the question is that the water impermeable, waxy material suberin in the form of strips is present in the **root endodermis**.

### Final Answer:
The correct answer is the **root endodermis**.