Assertion : Lichen is important for chemical industries.
Reason : Litmus and Orcein are formed from lichens.

Mention the economic importance of lichens.

Name two organisms associated to form lichens.

Name the organisms that form lichens .

Name the acid-base indicator extracted from lichens.

Assertion : Fossil fuels are important source of energy. Reason : Fossil fuels provide energy to different industries.

Importance : Lichens :

Lichens are ecologically important as they

Lichens are ecologically important as they

Assertion: Lichens are the plants growing perched on other plants. Reason: Lichens unitedly make association with algae and fungi and show mutualism.