How does an increase in external humidity affect the rate of transpiration?
Show answer and explanation
Correct answer: It decreases the rate.
Transpiration depends on the diffusion gradient between the leaf interior and the atmosphere. High humidity reduces this gradient, thereby slowing down the rate of water vapor loss.
Keep practicing
More Transpiration questions
- The 'transpiration pull' or suction force that pulls water up from the roots is best explained by which theory?
- During the day, stomata usually open due to the influx of which ions into the guard cells?
- What is the term for the loss of liquid water droplets from the margins of leaves, often mistaken for dew?
- Which of the following is an adaptation in xerophytes (desert plants) to reduce transpiration?
- In dorsiventral leaves (dicots), stomata are typically more numerous on the:
- Which plant hormone is known as the 'stress hormone' because it induces stomatal closure during water scarcity?