What is living? · NCERT Biology

Why is 'increase in body mass' not considered a defining property of living beings?

  1. Living beings never actually increase in body mass at any time
  2. Non-living objects like mountains and dunes also gain mass
  3. Only animals show a mass increase, not plants
  4. Mass increase results purely from catabolism only
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Correct answer: Non-living objects like mountains and dunes also gain mass

Growth by increase in body mass is observed in non-living objects like snow mountains or sand dunes via surface accumulation. Since the criterion is met by non-living entities, it cannot be a defining characteristic of life.

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