Which one is not a trait of xerophytes:

Options

A. Thick cuticle
B. Sunken stomata
C. Aerenchyma
D. Well developed mechanical tissue.

Answer

To determine which option is not a trait of xerophytes, we need to analyze each option provided in the question.

### Step-by-Step Solution:

1. **Understand Xerophytes**:
- Xerophytes are plants adapted to survive in dry, arid environments, such as deserts. They have specific adaptations to minimize water loss and maximize water retention.

2. **Analyze the Options**:
- **Option A: Thick Cuticle**:
- Xerophytes have a thick, waxy cuticle that helps reduce water loss by evaporation. This is a characteristic trait of xerophytes.
- **Option B: Sunken Stomata**:
- Xerophytes often have sunken stomata, which are located in pits on the leaf surface. This adaptation reduces transpiration by creating a humid microenvironment around the stomata. This is also a characteristic trait of xerophytes.
- **Option C: Erenchyma**:
- Erenchyma is a type of parenchyma tissue that is specialized for gas exchange, typically found in hydrophytes (plants adapted to aquatic environments). This is not a trait of xerophytes.
- **Option D: Well-Developed Mechanical Tissue**:
- Xerophytes often have well-developed mechanical tissues to support their structure in harsh environments. This is also a characteristic trait of xerophytes.

3. **Conclusion**:
- Based on the analysis, **Option C: Erenchyma** is not a trait of xerophytes. It is associated with hydrophytes instead.

### Final Answer:
**C: Erenchyma**

---