Lichens are not individual organisms; they are composite organisms that comprise of fungus and a photosynthetic organism that share a symbiotic relationship. The photosynthetic organism may either be green alga or nostoc. Interestingly, the physiological and biochemical characteristics of lichens are completely different from fungus or green alga. This uniqueness of lichens allows them to…
12th Jan 12 10:29 am | Garden Buildings Direct