Question

The following paragraph is related to the absorption of water from the soil. Complete the following paragraph by selecting the correct word from those given in the box. You may use the term only once.

exosmosis, hypertonic, osmosis, isotonic, hypotonic, cortical, endosmosis

Water enters the root hair from the soil by the process of _______. This is because the solution in the soil is _______, whereas the cell sap in the root hair cell is _______. The water then passes through the _______ cells by cell to cell _______ and reaches the xylem of the root.

Answer 1

Water enters the root hair from the soil by the process of endosmosis. This is because the solution in the soil is hypotonic, whereas the cell sap in the root hair cell is hypertonic. The water then passes through the cortical cells by cell to cell osmosis and reaches the xylem of the root.

KEYWORDS -

1. Endosmosis: It is the inward movement of water molecules through the semipermeable membrane when the medium surrounding the cell is less concentrated(hypotonic).
2. Hypotonic: It is the solution having lower solute concentration.
3. Hypertonic: It is the solution having high solute concentration.
4. Cortical cells: The cortex region consists of layers of cells known as cortical cells responsible for the transportation of materials.
5. Osmosis: It is defined as the movement of water molecules from the region of lower concentration to the region of higher concentration through a semipermeable membrane.