Question

When concentration of solute is low in plant cell, absorption of water is
A. Retarded
B. Increased
C. Normal
D. Absent

Answer 1

Hint: Let us discuss the process of absorption of water by the plants. Water absorption in lower plants takes place through the process of osmosis. The water absorption is through root hairs in higher plants.

Complete answer:
The movement of water molecules plays a crucial role in the intake of water by cells across the semipermeable membrane.
 The process in which the concentration of the solute in a plant cell is low compared to the surrounding solution is called exosmosis.
The result of this plasmolysis causes the movement of water particles out of the cell and helps in shrinking of the cell membrane away from the cell wall when it is placed in low osmotic concentration of cell sap compared to the outer solution.
Water always flows to a hypertonic solution from a hypotonic solution. Therefore when the soil solution that is present is hypotonic because of the low concentration of solutes, the water will flow into the cell due to the process of endosmosis and this results in the increase in absorption of water

The correct answer is option A for the above question.

Note: The water is passively transported to the roots and then later into the xylem.
The forces that are present for the cohesion and adhesion results in the water molecules to form a column in the xylem.
The water flows from the xylem into the mesophyll cells, resulting in the evaporation from their surfaces and leaves the plant through diffusion through the stomata.
The long-distance water movement is important for the survival of land plants. The water loss from the leaves should be compensated by the uptake of water from the soil.
 The water transport is also imperative for the uptake of essential mineral nutrients from the soil.