Question

what do you mean by lichens ??????
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Answer 1

A lichen is a very small grey or yellow plant that spreads over the surface of rocks, walls and trees and does not have any flowers

Answer 2

Answer:

hey your answer is here-

Lichens is a kind of plant mostly found ion rocks and trees made up of a specific fungi and algae that helps each other. example large coloured patches on tree branch.

hope it helps you.