Plants exhibit subepidermal evaporation of water during

Options

A. Photosynthesis
B. Guttation
C. Transpiration
D. Respiration

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the process during which plants exhibit subepidermal evaporation of water. This means we need to identify a process related to water loss in plants that occurs beneath the outer layer of the plant's skin (the epidermis).

2. **Identifying the Options**:
- a. Photosynthesis: This is the process by which plants convert light energy into chemical energy, using water and carbon dioxide to produce glucose and oxygen.
- b. Guttation: This is the process where water is expelled from the leaves in the form of droplets, usually occurring at night due to root pressure.
- c. Transpiration: This is the process of water vapor loss from the aerial parts of the plant, primarily through small openings called stomata.
- d. Respiration: This is the metabolic process where plants convert glucose and oxygen into energy, releasing carbon dioxide and water as byproducts.

3. **Analyzing Each Option**:
- **Photosynthesis** does not involve the evaporation of water; instead, it uses water.
- **Guttation** involves the exudation of water droplets from the leaves, which is not evaporation.
- **Transpiration** involves the loss of water vapor from the plant, primarily through stomata, which can be considered subepidermal since it occurs beneath the epidermis.
- **Respiration** is a metabolic process and does not specifically relate to water evaporation.

4. **Conclusion**: Based on the analysis, the process that involves subepidermal evaporation of water is **Transpiration**. Therefore, the correct answer is option **C**.

**Final Answer**: C. Transpiration

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