Q28 of 287 Page 366

How do organisms contribute in the formation of soil?

Lichens that grow on rock surface release chemical substances that cause the rock to powder down and form thin layers of soil. Small plants like moss also grow on the surface of rocks and cause them to break down.


More from this chapter

All 287 →
26

What is weathering? Elucidate in the various types of weathering.

 27

What is soil erosion? Explain means of preventing it.

 29

Discuss how water is replenished in sea.

 30

Write a note on nitrogen fixation?