Question

Assertion : Transpiration is a necessary evil. Reason : It causes water loss but helps in absorption and upward movement of water and minerals.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.

Answer 1

Answer:

option A

Explanation:

hope this helps u

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Answer 2

Answer:

Both A and R are true and R is the correct explanation of A. (Option a)

Explanation:

Transpiration

• Transpiration is a natural process that removes excess water from the plants and transports water molecules from the root to the tip of the plants.

• However, transpiration is called a necessary evil because it absorbs the water from the plants, and an increase in the rate of transpiration results in the drying up of the leaves. As a result, the plants die.
• Transpiration is an important phenomenon without which water transportation to the leaves of the plant is impossible.
• It helps the water evaporate from the stomata.
• It also causes the cooling of the plant and pumps minerals and water to the leaves of the plant, where photosynthesis takes place.
• Carbon dioxide is necessary for the process of photosynthesis.
• The absorption of CO₂ is done by the stomatal pores.
• The absorbed water from the roots is transported through xylem to different parts of the plant.
• Thus, transpiration is a significant process as it supplies water for the process of photosynthesis and helps cool down the plants.