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Question

A location with luxuriant growth of lichens on the trees indicates that the

A
location is highly polluted
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B
trees are heavily infested
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C
location is not polluted
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D
trees are very healthy
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Solution

The correct option is C location is not polluted
  • Lichens are the symbiotic association between algae and fungi.
  • The algae prepares food and the fungi helps in the absorption of the raw materials.
  • Lichens cannot survive in the presence of pollutants such as oxides of sulphur.
  • Thereby, they can act as natural indicators of pollution as they can only grow in pollution-free areas.
  • If a location exhibits luxuriant growth of lichens, then it is indicated that the location is not polluted.

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