According To definition of Lichens: Lichens are symbiotic associations of a fungus with the photosynthetic partner called as phycobiont such as green algae or cyanobacteria.gain, The two organisms live in close association with each other and both get benefit from this kind of association, this is called Symbiotic Association. By the way, Parasitic relation means living in or on another organism (host) and causing harm to it.
The White Nile (Arabic: Ø§ÙÙÙÙ Ø§ÙØ£Ø¨ÙØ¶ââ an-nÄ«l al-'abyaá¸) is a river in Africa, one of the two main tributaries of the Nile; the other is the Blue Nile. In the strict meaning, White Nile refers to the river formed at Lake Victoria, at the confluence of the Bahr al Jabal and Bahr el Ghazal Rivers.
W ith an estimated length of almost 6.700 km the Nile is the longest river in the world. The White Nile rises in Lake Victoria in Uganda.Untill today the discussion about the real source is still going on. Since 2006 the British discoverer Neil McGrigor claims having found the most distant source in Rwanda, at the beginning of the Kagera River with its mouth in the western part of Lake Victoria.rom here the river is known as the Albert Nile and is the last part of the river on Ugandan territory. Via South Sudan the White Nile enters Sudan. Near the capital Khartoum the White Nile meets the Blue Nile. This tributary begins at Lake Tana in Ethiopia and flows into Sudan from the southeast.