Lichens are ecologically important as they

Options

A. Purify air
B. Are pioneers of barren rocks
C. Are symbionts of algae and fungi
D. Are associated with mycorrhizal roots

Answer

B

Explanation

Economic Importance of Lichen are :-
* It is the pioneer community of ecological succession.
* It is air pollution indicator for 2 SO . It can not grow in polluted air.
* Some lichens are edible.
* Usnic acid is obtained by usnea is also called old’s man beard.
* Dye is obtained from lichen Rocella tinctoria. It is also source of litmus.