Stomata open at night and close during day time in

Options

A. Xerophytes
B. Mesophytes
C. Succulents
D. Hydrophytes

Answer

**Step-by-Step Solution:**

1. **Understanding Stomatal Behavior**: Normally, in most plants, stomata open during the day to allow for gas exchange (CO2 intake for photosynthesis) and close at night to prevent water loss. However, some plants exhibit a different pattern.

2. **Identifying Plant Types**: The question asks about plants where stomata open at night and close during the day. Such plants are typically found in arid environments and are known as xerophytes.

3. **Characteristics of Xerophytes**: Xerophytes have adapted to conserve water in dry conditions. One of their adaptations includes a special type of stomatal behavior where they open their stomata at night to take in CO2 while minimizing water loss.

4. **Mechanism of CO2 Fixation**: In xerophytes, the CO2 absorbed at night is converted into organic acids, which are stored in the plant. During the day, when the stomata are closed, these acids are broken down to release CO2 for photosynthesis.

5. **Conclusion**: Therefore, the answer to the question is that stomata open at night and close during the day in xerophytes.

**Final Answer**: Stomata open at night and close during the day in xerophytes.

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