Question

general account on lichens

Answer 1

Lichen is the symbiotic association of algae nd fungi. Upper part is made up of algae filament while lower part is made of fungal hyphae, fungal hyphae provide water and minerals to algae while algae prepare the food material. They grow on dark place, tree and rock

Eg- graphis, gynophora

I hope it helps you

Answer 2

lichens means symbiotic relationship of algae with fungi
algae is called phycobiont and fungi is called mycobiont
In this relationship both the organisms are benefitted
algae makes food while fungi gives shelter and minerals to algae
in return algae give food to it