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.
The Nile River has two major branches, the Blue Nile and the White Nile. Both branches are named for the color of their water. The Blue Nile is a bright blue at its source, and begins to darken when it reaches the Sudan, while the White Nileâs water is a whitish-gray (Hoyt, 2008).The White Nile is longer and travels through Egypt, Uganda, and meets the Blue Nile in the Sudan.he Blue Nile is a bright blue at its source, and begins to darken when it reaches the Sudan, while the White Nileâs water is a whitish-gray (Hoyt, 2008).