Lichens
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Lichens are composed of two organisms living in symbiotic mutualism: a fungus and an alga (Lichens, 2000). Most of the lichen is composed of fungal filaments (the mycobiont), with algal cells (the phycobiont), usually from either a green alga or a cyanobacterium (formerly called blue-green algae) living among them. In many cases the fungus and the alga making up the lichen are capable of independent life, but sometimes the fungus has become dependent on the algal partner for survival. The appearance of the fungus within the lichen is quite different from its morphology as a separate entity. Fungi are incapable of making their own food, and usually provide for themselves as parasites or decomposers. Lichen fungi cultivate partners that manufacture food by photosynthesis - the algae (The Special Biology, 2000). Lichens reproduce in two basic ways: firstly, a lichen may produ
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Approximate Word count = 596
Approximate Pages = 2 (250 words per page)
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