NEET BIOLOGY

Detailed explanation-1: -The xylem is a tissue which transports water and minerals from the roots up the plant stem and into the leaves. Xylem consists of dead cells. The cells that make up the xylem are adapted to their function: They lose their end walls so the xylem forms a continuous, hollow tube.

Detailed explanation-2: -The xylem tissue carries water and mineral ions from the soil up to the stem and the leaves. The mineral ions and water only travels in one direction. Xylem cells are dead. The phloem tissue transports sugars made from the leaves to the rest of the plant.

Detailed explanation-3: -Nitrate ions are transported up the plant in the xylem and can be used to make amino acids etc. in the leaf cells.

Detailed explanation-4: -They use two different systems-xylem moves water and mineral ions from the roots to the leaves-phloem moves food substances such as sucrose (sugar) and amino acids from leaves to the rest of the plant. This movement of food is called translocation .