Site of transpiration is

Options

A. Stem
B. Roots
C. Leaves
D. Aerial parts

Answer

**Step-by-Step Text Solution:**

1. **Understanding Transpiration**: Transpiration is defined as the process through which water vapor is lost from a plant to the atmosphere. This primarily occurs through small openings called stomata.

2. **Identifying the Site of Transpiration**: The main site of transpiration in plants is the stomata, which are primarily found on the leaves. However, stomata can also be present on stems and other aerial parts of the plant.

3. **Role of Stomata**: Stomata are microscopic pores that allow for gas exchange; they facilitate the loss of water vapor while also allowing carbon dioxide to enter for photosynthesis.

4. **Parts of the Plant Involved in Transpiration**:
- **Leaves**: The majority of transpiration occurs here due to the high density of stomata.
- **Stems**: Some transpiration can occur through the stems, especially if they are green and contain chlorophyll.
- **Roots**: Roots do not have stomata, so they do not participate in transpiration.

5. **Conclusion**: Since transpiration primarily occurs in the aerial parts of the plant (which include leaves and stems), the correct answer to the question is that the site of transpiration is the aerial parts of the plant.

**Final Answer**: The site of transpiration is the aerial parts of the plant.

---