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 Nileâs two major tributaries are known as the White Nile and the Blue Nile. The White Nile begins its path in Rwanda and wends its way north through Tanzania, Uganda, and South Sudan, where it merges with the Blue Nile at Khartoum. The Blue Nile begins in Ethiopia and flows into Sudan to Khartoum.he River Nile takes its name from the Greek word 'Nelios' meaning River Valley and it is the longest river in the world. Although many people consider it an Egyptian river, it actually flows through many countries and is the primary water source for both Egypt and Sudan.