Question

detail information of lichen

Answer 1

lichen is a type of plant with which is used for making Litmus Paper

Answer 2

A lichen is not a single organism. Rather, it is a symbiosis between different organisms - a fungus and an alga or cyanobacterium. Cyanobacteria are sometimes still referred to as 'blue-green algae', though they are quite distinct from the algae.