Lichens and Their Significance · NCERT Biology

Lichens contribute to soil formation mainly by:

  1. Producing large amounts of biomass
  2. Secreting acids that weather rocks
  3. Fixing carbon dioxide
  4. Accumulating organic debris only
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Correct answer: Secreting acids that weather rocks

Lichens secrete organic acids that slowly break down rocks. This process helps in the formation of soil during primary succession.

Difficulty: Medium Question 11 of 20

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