In xerophytes, photosynthesis often occurs through

Options

A. Root
B. Modified stem
C. Stomata
D. Scaly leaves

Answer

**Step-by-Step Solution:**

1. **Understanding Xerophytes**: Xerophytes are plants adapted to survive in environments with very little water. They have special adaptations to minimize water loss and maximize water storage.

2. **Examples of Xerophytes**: Common examples include cacti, which are typically found in desert regions. These plants have evolved to thrive in dry conditions.

3. **Photosynthesis in Xerophytes**: In xerophytes, traditional leaves may be modified to reduce water loss. For instance, in cacti, leaves are transformed into spines.

4. **Role of Modified Stems**: The primary site for photosynthesis in many xerophytes, including cacti, is the modified stem. The stem is adapted to perform photosynthesis instead of the leaves.

5. **Adaptations of the Stem**: The stems of xerophytes contain specialized cells that are packed closely together to store water. They also have a waxy cuticle on the epidermis to further reduce water loss.

6. **Stomatal Behavior**: Xerophytes can close their stomata during the day to minimize water loss and open them at night to allow for the intake of carbon dioxide. This adaptation is part of a process known as CAM (Crassulacean Acid Metabolism) photosynthesis.

7. **Conclusion**: Therefore, in xerophytes, photosynthesis often occurs through the modified stem.

**Final Answer**: In xerophytes, photosynthesis often occurs through the modified stem.

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