. Lichens are called pioneers colonizers of bare rock. How can they help in the formation of soil? Also explain why lichens donot
occur in Delhi whereas they commonly grow in Manali or Darjeeling.
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Explanation:
American pioneers are any of the people in American history who migrated west to join in settling and developing new areas. The term especially refers to those who were going to settle any territory which had previously not been settled or developed by European, African or American society, although the territory was inhabited by or utilized by Native Americans.
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Lichens are bluish coloured organisms. They helps in maoing soil. Theu are used as indicators óf pollution because they do not grow in polluted areas. That is why they dont grw in Delhi. Lichens can also grow on rocks. When these grow bigger and bigger in rocks, they cause cracks which causé the rock to break into small piec3s.
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