Question : An organism which can monitor air pollution is:
Option 1: Bacteria
Option 2: Lichen
Option 3: Algae
Option 4: Fungi
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Correct Answer: Lichen
Solution : The correct answer is Lichen .
Lichen is a symbiotic association between algae and fungi in which algae produce food, and fungi provide shelter. They are pioneer species in the terrestrial ecosystem and act as a biological indicator for pollution. They show high sensitivity to sulphur dioxide, and cannot survive in places with pollution. Locations having lichen growth indicate that air condition is good.
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