Question

Case: Transpiration is the evaporative loss of water by plants. It occurs mainly through the stomata in the leaves. Besides the loss of water vapour in transpiration, exchange of oxygen and carbon dioxide in the leaf also occurs through pores called stomata. Normally stomata remain open during the day and close at night.

Based on the above case answer the following question:

Which of the following is not a purpose of transpiration?

• A. Helps in absorption and transport in plants.
• B. Prevents loss of water.
• C. Maintains shape and structure of plants by keeping the cells turgid.
• D. Supplies water for photosynthesis.

Answer 1

The correct option is B Prevents loss of water.

Loss of water is a defining feature of transpiration. This loss of water vapour through evaporation creates a suctional pull which helps in transport of water from roots to the aerial parts of the plant. The water transported is absorbed by the cells for photosynthesis and also helps maintain the turgidity inside the cell.