CAM helps the plants in
(a) Reproduction
(b) Conservation water
(c) Secondary growth
(d) Disease resistance

Options

A. Reproduction
B. Conservation water
C. Secondary growth
D. Disease resistance

Answer

**Step-by-Step Solution:**

1. **Understanding CAM:** CAM stands for Crassulacean Acid Metabolism. It is a photosynthetic adaptation found in certain plants, particularly those in arid environments, known as xerophytes.

2. **Function of CAM:** The primary function of CAM is to help plants conserve water. This is especially important for plants that grow in dry conditions where water is scarce.

3. **Stomatal Behavior:** In CAM plants, the stomata (tiny openings on the leaves) are scotoactive, meaning they open at night instead of during the day. This adaptation helps to minimize water loss.

4. **Carbon Dioxide Uptake:** During the night, when the stomata are open, CAM plants take in carbon dioxide (CO2) and convert it into organic acids (this process is known as dark acidification).

5. **Photosynthesis During the Day:** During the day, the stomata remain closed to prevent water loss. The stored organic acids are then converted back into CO2 for use in the Calvin cycle, allowing the plant to perform photosynthesis without losing excessive water.

6. **Conclusion:** Given the options provided, the correct answer is (b) Conservation of water, as CAM primarily helps plants to reduce water loss in arid environments.

**Final Answer:** (b) Conservation of water

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