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State PCS PYQPrelims 2019

UPPCS · Question 59

Which one of the following is the well known example of bioindicator of air pollution?

  1. Lichens
  2. Methyl mercury
  3. Rose plant
  4. Sunflower
Show answer & explanation

Answer: (A) Lichens

Explanation

Lichens are highly sensitive to SO2 and are a well-known bioindicator of air pollution: they disappear from polluted areas.