In most of the thin leaf mesophytes, the leaf stomata open during day and close night. It comes under

Options

A. Barley type
B. Potato type
C. Alfalfa type
D. Bean type

Answer

To solve the question regarding the type of stomatal behavior in thin leaf mesophytes, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Stomata**: Stomata are small openings on the leaf surface that facilitate gas exchange (CO2 in, O2 out) and transpiration (water vapor loss).

2. **Identifying Stomatal Behavior**: The question specifies that in thin leaf mesophytes, the stomata open during the day and close at night. This behavior is indicative of a specific type of stomatal regulation.

3. **Analyzing the Options**:
- **Barley Type**: Stomata open for a few hours during the day and close at night.
- **Potato Type**: Stomata are open throughout the day and only close for a few hours at night.
- **Alfalfa Type**: Stomata are open throughout the day and close at night.
- **Bean Type**: Stomata open for a few hours during the day and close at night.

4. **Matching the Behavior**: The behavior described in the question (open during the day, closed at night) matches the **Alfalfa Type**.

5. **Conclusion**: Therefore, the correct answer is **Alfalfa Type** (Option 3).

### Final Answer:
The stomata in most thin leaf mesophytes that open during the day and close at night come under the **Alfalfa Type**.

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