Q.

Lichens are indicators of pollution as:

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a

they grow more on polluted areas

b

they are not found in non-polluted areas

c

they do not grow in polluted areas

d

not related to pollution

answer is C.

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Detailed Solution

If one saw a lichen in nature one would never imagine that they had two different organisms within them. Lichens are very good pollution indicators – they do not grow in polluted areas.

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Lichens are indicators of pollution as: