Which of the following is not a purpose of transpiration

Options

A. Supplies water for photosynthesis
B. Maintains shaps and structure of plants
C. Helps in translocation of suger from source to sink
D. Cools leaf surfaces

Answer

**Step-by-Step Solution:**

1. **Understanding Transpiration**: Transpiration is the process through which water is absorbed by plant roots, moves through the plant, and is released as vapor through small openings in the leaves called stomata. This process is crucial for various functions in plants.

2. **Identifying the Purposes of Transpiration**:
- **Water and Mineral Absorption**: Transpiration helps in the upward movement of water and minerals from the roots to the leaves.
- **Photosynthesis**: Water is essential for photosynthesis, and transpiration aids in supplying this water.
- **Maintaining Plant Structure**: The loss of water creates a negative pressure that helps maintain the turgidity and structure of the plant.
- **Cooling of Leaf Surfaces**: The evaporation of water from leaf surfaces helps cool the plant.

3. **Analyzing the Options**:
- **Supplies water for photosynthesis**: This is a purpose of transpiration.
- **Maintain shape and structure of plant**: This is also a purpose of transpiration.
- **Helps in translocation of sugar from source to sink**: This is NOT a purpose of transpiration. Translocation of sugars occurs through the phloem and is not directly related to the process of transpiration.
- **Cool leaf surfaces**: This is a purpose of transpiration.

4. **Conclusion**: The option that is NOT a purpose of transpiration is "helps in translocation of sugar from source to sink."

**Final Answer**: Helps in translocation of sugar from source to sink.

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