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NTA Abhyas NEET2020BotanyBiological ClassificationPractice

Which of the following organisms are indicator of SO 2 pollution?

Options

  1. AMosses
  2. BPuffballs
  3. CLichens
  4. DMushrooms

Correct answer

C. Lichens

Step-by-step solution

Lichens are widely used as environmental indicators or bio-indicators. If air is very badly polluted with sulphur dioxide there may be no lichens present, just green algae may be found. If the air is clean, shrubby, hairy and leafy lichens become abundant.

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