Question

With an increase in temperature, the rate of transpiration becomes

• A. Low
• B. High
• C. Low in herbs and high in tress
• D. Immediately stops

Answer 1

Answer: (B)

High

Transpiration is the evaporation of water from plants. It occurs chiefly in the leaves while their stomata are open for the passage of CO₂ and O₂ during photosynthesis. Plants transpire more rapidly at higher temperatures because water evaporates more rapidly as the temperature rises. At 30°C, a leaf may transpire three times as fast as it does at 20°C. Hence option B is correct.