Question

With the decrease in atmospheric pressure, the rate of transpiration will

• A. decrease rapidly
• B. increase rapidly
• C. remain the same
• D. decrease slowly

Answer 1

The correct option is B

increase rapidly

The correct option is B.

Explanation for the correct option

1. Transpiration is the loss of water from the plants in the form of vapors.
2. Atmospheric pressure is the pressure of the air outside the living system.
3. The movement of air occurs from high pressure to lower pressure.
4. Thus, the low air pressure outside the plant system will cause an increase in the transpiration pull in the plants. This causes the water vapors to move out into the atmosphere.
5. Therefore, with a rapid decrease in atmospheric pressure, the rate of transpiration increase rapidly.

Explanation for incorrect options

Option A

With an increase in atmospheric pressure, the rate of transpiration decreases rapidly.

Option C

The change in the atmospheric pressure changes the transpiration rate in plants.

Option D

With a slow increase in the atmospheric pressure, the transpiration rate decrease slowly.

With the sudden decrease in the atmospheric process, the amount of water loss from the plants increases rapidly.