Question

Active absorption of water by roots from the soil is mainly affected by:
A. Tension in cell sap due to transportation.
B. Hydrophobic nature of root hair.
C. Typical tissue organization.
D. Osmotic concentration of xylem sap.

Answer 1

Hint: Xylem is a tissue which transports water to all parts of the body. Xylem is made up of different types of cells. Xylem is complex permanent tissue because it is made up of more than one type of cell. But after combining all cells it performs the same function like transport water, mineral and food material.

Complete answer:
Cells produce in the xylem and look hairs like structure, produce in the root phase and these root phase structures play vital roles in the absorption of water from the soil. All the roots are very small in size particles and called hair roots. In water different kinds of salts and minerals are present, water is a diluted solution the cell is filled with liquid known as cytoplasm and on the other hand water is a solution present on the ground. By the process of osmosis water enters in the roots. Osmosis enters the root low concentration to higher concentration through the plasma membrane. At the time of absorption some root pressures force uplifting the water molecules and take it to all parts of the plant.

Therefore the correct answer is option D: Osmotic concentration of xylem sap.

Note: There are two kinds of forces present in it: cohesive forces and adhesive forces help in formation in the xylem column. Cohesive forces means the same kind of interaction in the water molecules and water molecules attached very tightly with each other. On the other hand adhesive forces means different kinds of interactions present in it these are present in the water molecules and the xylem vessels.