Question

The cohesion transpiration pull theory operates only in

• A. Passive water absorption
• B. Active water absorption
• C. Conditions favouring transpiration
• D. Conditions restricting transpiration

Answer 1

Answer: (C)

Conditions favouring transpiration

• The cohesion-tension theory is a theory of intermolecular attraction that explains the process of water flow upwards (against the force of gravity) through the xylem of plants.
• Transpiration pull, utilizing capillary action and the inherent surface tension of water, is the primary mechanism of water movement in plants.
• Hence, The cohesion transpiration pull theory operates only in Conditions favouring transpiration.
• So, the correct answer is 'Conditions favouring transpiration'.