NEET 2014 Biology question

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

(1)Trees are very healthy
(2)Trees are heavily infested
(3)Location is highly polluted
(4)Location is not pollutedCorrect

Answer: (4)

Solution

Lichens are very sensitive to air pollutants, especially sulphur dioxide, and do not grow in polluted areas, so they are used as bio-indicators of air pollution. Luxuriant

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Question ID VK-091605