Which ones do not show transpiration ?

Options

A. Aquatic plants with floating leaves
B. Aquatic submerged plants
C. Plants growing in hilly areas
D. Plants living in deserts

Answer

To determine which type of plant does not show transpiration, we can analyze the options provided:

1. **Aquatic plant with floating leaves**: These plants have stomata on their floating leaves, allowing them to transpire. They can lose water vapor to the atmosphere.

2. **Aquatic submerged plant**: This type of plant is typically found underwater and does not have stomata. Instead, gaseous exchange occurs through the leaf surfaces submerged in water. Since they lack stomata, they do not transpire.

3. **Plant growing in hilly areas**: These plants generally have stomata and can transpire, as they are exposed to the atmosphere.

4. **Plant living in desert**: Although these plants may have adaptations to minimize water loss, they still possess stomata and can transpire, albeit at a reduced rate.

Based on this analysis, the plant that does not show transpiration is the **aquatic submerged plant**.

### Steps:
1. **Identify the types of plants listed**: Look at the characteristics of each plant type.
2. **Assess the presence of stomata**: Determine if each plant has stomata, as this is crucial for transpiration.
3. **Evaluate gaseous exchange mechanisms**: Understand how each plant exchanges gases and if they can lose water vapor.
4. **Conclude which plant does not transpire**: Based on the assessment, identify the plant that lacks stomata and therefore does not transpire.