Which evolutionary adaptation enables succulent plants in arid environments to thrive?

💡 Explanation

When succulent plants inhabit arid regions, limited water availability favors the CAM pathway because it minimizes water loss through nocturnal CO2 fixation and daytime stomatal closure, enhancing survival. Therefore, CAM development results, rather than stress hormones, xylem changes or trichome reduction, not crucial mechanisms for arid survival.

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