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Lichens are called pioneer colonisers of...

Lichens are called pioneer colonisers of bare rock. How can they help in formation of soil?

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Licheus grow on the rock surface extract minerals from them this creates small creviees at places where a thin layer of soil build sup.
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(A) : Lichens cannot be the pioneer species on a bare rock. (R) : They are unable to tolerate desiccation and temperature.

Name the pioneer species on a bare rock. How do they help in establishing the next ype of vegetation ? Mention the type of climax community that will ultimately get established.

Name the pioneer species on a bare rock. How do they help in establishing the next type of vegetation? Mention the type of climax community that will ultimately get established.

How can we prevent the loss of top soil?

NCERT EXEMPLAR-NATURAL RESOURCES -Natural Resources
  1. Soil formation is done by both abiotic factors. List the names of thes...

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  2. All the living organisms are basically made up of C,N,S,P,H and O, . H...

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  3. Why does the percentage of gases like oxygen, nitrogen and carbon diox...

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  4. Why does moon have very cold and very hot temperature variations e.g.,...

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  5. Why do people love to fly kites near the seashore ?

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  6. Why does Mathura refinery pose problems to the Taj Mahal?

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  7. Why do not lichens occur in Delhi whereas they commonly grown in Manal...

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  8. Why does water need conservation even though large oceans surround the...

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  9. There is mass mortality of fishes in a pond. What may be the reasons?

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  10. Lichens are called pioneer colonisers of bare rock. How can they help ...

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  11. Soil is formed by water'. If you agree to this statements then give re...

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  12. Fertile soil has lots of humus. Why?

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  13. Why step farming is common in hills?

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  14. Why are root nodules useful for the plants?

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  15. How do fossil fuels cause air pollution?

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  16. What are the causes of water pollution? Discuss how you can contribute...

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  17. A motor car, with its glass totally closed, is parked directly under t...

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  18. Justify 'Dust is a Pollutant'.

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  19. Explain the role of the sun in the formation of soil.

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  20. Carbon dioxide is necessary for plants. Why do we consider it as a pol...

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