Q. Which is not true of hydrophytes ?

Options

A. a) Poorly developed root system
B. b) Thin membranous leaves
C. c) Poorly developed large air spaces
D. d) Poorly developed vascular bundles

Answer

To determine which statement is not true about hydrophytes, we need to analyze each option carefully.

### Step-by-Step Solution:

1. **Understanding Hydrophytes**:
- Hydrophytes are plants that thrive in aquatic environments. They are adapted to living in water, which influences their structure and function.

2. **Analyzing Option A - Poorly Developed Root System**:
- Hydrophytes typically have poorly developed root systems because they are submerged in water, which provides support and nutrients. However, many hydrophytes may have very small or even absent roots, making this statement somewhat misleading.

3. **Analyzing Option B - Thin Membranous Leaf**:
- This statement is true. Hydrophytes often have thin, membranous leaves to facilitate gas exchange and reduce water loss.

4. **Analyzing Option C - Poorly Developed Large Air Spaces**:
- This statement is also true. Hydrophytes have specialized tissues called aerenchyma, which contain large air spaces to help with buoyancy and gas exchange.

5. **Analyzing Option D - Poorly Developed Vascular Bundles**:
- This statement is true as well. Hydrophytes often have poorly developed vascular tissues because they do not need to transport water from the soil.

6. **Conclusion**:
- The statement that is not true about hydrophytes is Option A, which suggests they have a poorly developed root system. While they may have small roots, the statement is misleading as many hydrophytes can have very minimal or absent roots.

### Final Answer:
The correct answer is **Option A: Poorly developed root system**.

---