Question

Give the economic importance of lichens.

Answer 1

Lichens are the organisms that are formed by the association of the filamentous fungus and the microscopic green algae or cyanobacteria.

Significance of lichens are:

 

Usnic acid, a very active lichen substance is used in pharmaceutical preparations.Some lichens are processed in the perfume industry.Some lichens are sensitive reagents for the evaluation of air pollution.

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Answer 2

Some economic importance of lichens are-
* Since early times the lichens were used to cure diseases such as jaundice diarrhoea ,fever ,epilepsy , hydrophobia and various skin diseases.
* lichens are very sensitive to atmospheric pollutants such  as Sulphur dioxide. So they are used as reliable biological indicators for pollutants.

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