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The Fundamental Unit of Life — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceThe Fundamental Unit of Life1 Mark
MCQ
Water will be absorbed by the root hair because:
  • ✓
    Concentration of solutes in the cell sap in root hair cell is high.
  • B
    Plant is rapidly respiring.
  • C
    They are separated from soil by permeable membrane.
  • D
    Concentration of salts in the soil is high.
✓

Answer

Correct option: A.
Concentration of solutes in the cell sap in root hair cell is high.
Absorption of water refers to translocation of water from soil solution to xylem of root.
Root hairs collect water and mineral nutrients that are present in the soil and take this solution up through the roots to the rest of the plant.
The osmosis of water occurs in the root hair due to the presence of a high concentration of solutes in the cell sap.

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