AP BIOLOGY

Detailed explanation-1: -Explanation for correct option: Transpiration is the loss of water by the stomatal openings of the aerial parts of the plant. This helps in the upward movement of water and minerals from the roots to the leaves by a cohesion-adhesion mechanism.

Detailed explanation-2: -Transpiration helps in the conduction of water and minerals to different parts of the plants. Due to the continuous elimination of water from the plant body, there is a balance of water maintained within the plant. It maintains osmosis and keeps the cells rigid.

Detailed explanation-3: -Transpiration provides a suction force that is required for the absorption of water, which is required for photosynthesis. As molecules line up for absorption in the xylem tissues, the first molecule is lost by the plant owing to transpiration.

Detailed explanation-4: -This is transpiration. It has two main functions: cooling the plant and pumping water and minerals to the leaves for photosynthesis.

Detailed explanation-5: -As a result of transpiration, a suction force is created in the xylem vessel. This force causes water to be pulled up from the xylem in the roots to the stem and leaves. This pulling force is called transpirational pull.