Environment And Road Safety Education And Violence Against Women And Children And Drug Abuse 2021 Exam With Answers

Practice Mode:
31.

Which one of the following is useful biological indicator of SO₂ pollution?

A: Pseudomonas
B: Algal blooms
C: Lichens
D: Bryophytes

The answer is: C

Explanation

The correct answer is Lichen. Due to the sensitivity of Lichens to sulphur dioxide, it is very useful as a biological indicator of Sulphur-dioxide pollution.