In which of the following plants , there will be no transpiration ?

Options

A. submerged aquatic plants
B. Plants living in plains
C. Aquatic plants with floating leaves
D. Plants growing in hilly regions

Answer

To determine which of the following plants does not undergo transpiration, we need to understand the process of transpiration and the characteristics of the plants listed in the options.

### Step-by-Step Solution:

1. **Understanding Transpiration**:
- Transpiration is the process of water loss from a plant in the form of vapor, primarily through small openings in the leaves called stomata.
- It serves two main purposes: cooling the plant and facilitating the uptake of nutrients and water from the soil.

2. **Identifying the Plants**:
- The options provided are:
1. Submerged aquatic plants
2. Plants living in plains
3. Aquatic plants with floating leaves
4. Plants growing in hilly regions

3. **Analyzing Each Option**:
- **Submerged Aquatic Plants**: These plants are fully submerged in water and do not have stomata. Instead, they perform gas exchange through their leaf surfaces. Since they are surrounded by water, they do not need to transpire to lose water.
- **Plants Living in Plains**: These plants typically have stomata and undergo transpiration as they are exposed to air and need to regulate water loss.
- **Aquatic Plants with Floating Leaves**: These plants have stomata on their floating leaves and can transpire, as they are partially exposed to air.
- **Plants Growing in Hilly Regions**: These plants also generally have stomata and undergo transpiration, as they are exposed to the atmosphere.

4. **Conclusion**:
- Based on the analysis, the correct answer is **Submerged Aquatic Plants**. They do not perform transpiration because they lack stomata and are surrounded by water.

### Final Answer:
**Submerged Aquatic Plants do not undergo transpiration.**