EVERYDAY SCIENCE

Detailed explanation-1: -Transpiration is a process that involves loss of water vapour through the stomata of plants. The loss of water vapour from the plant cools the plant down when the weather is very hot, and water from the stem and roots moves upwards or is ‘pulled’ into the leaves.

Detailed explanation-2: -The transpiration rate is directly proportional to the absorption of water by the roots from the soil. A decrease in water absorption causes the closure of stomata and wilting, thereby reducing the rate of transpiration.

Detailed explanation-3: -Yes, transpiration helps in the cooling of plants and it also regulates the temperature of the plant. It is a natural process. Water evaporates at different rates by different plants.

Detailed explanation-4: -Transpiration is the process in which plant roots absorb water and then release the water in the form of vapour through the leaves.

Detailed explanation-5: -Transpiration is absent in truly submerged plants, but the presence of guttation verifies that long-distance water transport takes place. Use of tritiated water showed that the water current arises from the roots, and the main flow of water is channeled to the youngest leaves.