HORTICULTURE

Detailed explanation-1: -The raw materials of photosynthesis, water and carbon dioxide, enter the cells of the leaf. Oxygen, a by-product of photosynthesis, and water vapor exit the leaf. In most land plants, water enters the roots and is transported up to the leaves through specialized cells known as xylem (pronounced zigh-lem).

Detailed explanation-2: -Each plant contains a branched system of tubes called xylem, which is responsible for water transport from the roots (where it is taken up) to the leaves (where it is used in photosynthesis). Water flows up from the roots, through the trunk and branches, to the leaves, where it is used in photosynthesis.

Detailed explanation-3: -Water is necessary for photosynthesis, which is how plants use energy from the sun to create their own food. During this process, plants use carbon dioxide from the air and hydrogen from the water absorbed through their roots and release oxygen as a byproduct. This exchange occurs through pore-like stoma on the leaves.