Casparian strips are seen in

Options

A. Dicot root
B. Monocot stem
C. Monocot root
D. All except (2)

Answer

**Step-by-Step Solution:**

1. **Understanding Casparian Strips**:
- Casparian strips are band-like thickenings found in the endodermis of plant roots. They are composed of suberin, a waxy substance that makes the cell walls hydrophobic.

2. **Location of Casparian Strips**:
- These strips are specifically located in the endodermis, which is the innermost layer of the cortex in roots. They surround the vascular tissue and play a crucial role in regulating the movement of water and nutrients into the vascular system.

3. **Occurrence in Plants**:
- Casparian strips are found in the roots of all higher plants, including both dicots and monocots. They are not present in the stems of these plants.

4. **Identifying the Correct Answer**:
- Given the options, we need to determine where Casparian strips are found. They are present in:
- Dicot roots
- Monocot roots
- They are not found in the stems of either type of plant.

5. **Conclusion**:
- Therefore, the correct answer is that Casparian strips are seen in roots of both dicots and monocots, but not in their stems. The best option that summarizes this is "all except two," indicating they are present in both types of roots but absent in stems.

**Final Answer**: Casparian strips are seen in the roots of dicots and monocots, but not in their stems (Option 4).

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