First slide

Viruses, Viroids,Prions and Lichens

Question

Which of the following are most suitable indicators of ${SO}_{2}$ pollution in the environment?

Easy

A

Algae
B

Fungi
C

Lichens
D

Conifers

Solution

Lichens are most suitable indicators of ${SO}_{2}$ pollution in the environment.
Lichens are considered as best indicators of air pollution especially caused by vehicular discharges or industrial smokes. They are highly sensitive to sulphur dioxide pollution in air. Lichen thalli turning black is an indicator of high level of sulphur dioxide in atmosphere.

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