question_answer

  This activity proves and shows that living plants absorb water from the soil and water gets transported to the leaves and loss of water takes place by leaves i.e., transpiration. Based on the above activity, give the answers of the following questions. (a) Why transpiration is necessary for the plants? (b) What is transpiration pull?

Answer:

  (a) Transpiration is necessary because of the following reasons (i) It helps in the absorption and upward movement of water and minerals by creating a transpiration pull. (ii) It helps in temperature regulation. (iii) It maintains a constant supply of ions to the leaves. (iv) It helps to remove excess water.                                                                                                                                      (b) Water vapour evaporates from the leaf creates a kind of suction (towards upward) which is called transpiration pull.                                                                                                                                                       (1/2)