A special photosynthetic pathway (CAM) in plants serves as an adaptation against

The Crassulacean Acid Metabolism (CAM) photosynthetic pathway in plants serves as an adaptation against arid conditions or dry environments.

Here's how it works:

1. During the night, when the atmospheric conditions are more humid and cooler, the stomata (small openings on the leaves) open to allow the intake of carbon dioxide (CO2). This CO2 is then stored in the form of malic acid.

2. During the day, when the conditions are hotter and drier, the stomata close to prevent water loss through transpiration. The stored malic acid is then broken down to release the CO2.

3. This CO2 is then used in the photosynthesis process to produce glucose, which is the energy source for the plant.

4. The oxygen produced as a byproduct of photosynthesis is then released back into the atmosphere when the stomata open again at night.

This adaptation allows CAM plants to carry out photosynthesis while minimizing water loss, making them well-suited to survive in dry environments.