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Nature & Animals

Which outcome occurs when an orchid's velamen severely restricts airflow?

A)Reduced water translocation efficacy
B)Increased nutrient uptake capacity
C)Enhanced photosynthetic rate efficiency
D)Accelerated cuticular transpiration resistance

💡 Explanation

Reduced translocation occurs because impeded aeration directly hampers cuticular transpiration from the velamen, compromising the tension from cohesion-tension mechanism; therefore decreased pull of water occurs, rather than improved photosynthesis under hypoxic humidity due to poor air circulation in the tissues.

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