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🔬 Biology  ·  Transport in Plants  ·  NEET

Imbibition, as seen in a dry seed absorbing water, is distinct from osmosis mainly because it:

  • A Is adsorption of water by hydrophilic colloids like cell wall and storage proteins
  • B Takes place in animal tissue rather than plant tissue in general clinical practice
  • C Needs metabolic energy supplied by respiration in the seed according to standard texts
  • D Needs a semi-permeable membrane separating two unequal solutions under typical physiological conditions

Correct answer: A. Is adsorption of water by hydrophilic colloids like cell wall and storage proteins

Explanation: Imbibition is the diffusion of water into solids (like dry seeds) that causes them to swell, driven by adsorption onto hydrophilic surfaces, and does not require a semi-permeable membrane the way osmosis does.

Concept context

Water and mineral absorption, the ascent of sap, transpiration, and phloem transport via the pressure flow hypothesis.

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