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Following are a few organisms:
(a). Lichen
(b). Mosses
(c). Mango tree
(d). Cactus
Which among the above can grow on stones; and also help in formation of soil?
Write the mode of their action for making soil.
Answer:
These are the first inhabitants of pioneers on a bare rock. They bring about the slow weathering of rocks and the formation of soil. , which live on rocks, produce acids such as . The latter forms a thin coating of soil by corroding the surface of rocks. Other plants like later grow on such surfaces and cause the further breaking up of rocks. The cracks further become wider and deeper when the roots of short-lived herbs pass into them. This whole process of weathering of rocks involving living organisms is called .
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