Which outcome occurs when CAM photosynthetic pathways remain constitutively active in a high-humidity wetland environmen?

💡 Explanation

When CAM plants in wetlands constitutively fix CO2 at night, stomata close during the day which leads to decreased CO2 availability because of reduced gas exchange from high humidity. Therefore, photosynthetic efficiency decreases, rather than increased water efficiency, increased CO2 uptake, or decreased photorespiration, which are beneficial only when under drought stress.

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