Multiple choice

Which of the following are indicators of pollution?

  1. Lichens

  2. Fungi

  3. Algae

  4. None of these

  5. -
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The hardy lichens are useful bioindicators for air pollution, espeially sulphur dioxide pollution. They derive their water and essential nutrients mainly from the atmosphere, rather than from the soil. They are able to react to air pollutants all year round.

Keep practicing — related questions