Answers

2016-04-16T13:07:24+05:30
A flavouring agent in the name of 'Pather phul'.It is also a thpe of lichen.The fungus  colony attacks an algal colony where most of the algal colony that fails to compete dies out.The more adaptive forms live on to form symbiotic relationship with the fungi in colonies called Lichens.The fungus  provides water and minerals to the algae,while the algae performs photosynthesis and supplies food in the form of sugars to the fungus.It is an symbiotic relationship.
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2016-04-16T13:33:26+05:30
A lichen is not a single organism, but the result of a partnership (symbiosis) between a fungus and an alga or cyanobacteria. 
lichen is not a separate organism in the sense of being one type of individual. It is actually a close partnership between a fungi and algae.The two types of organisms in the partnership are so closely interwoven that they appear as a single individual. 

Yes, lichen is in a symbiotic relation between fungi and algae..
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