Virus, Viroids Prions and Lichens
Join Our Telegram Group:- GroveStudies VIRUS ,VIROIDS PRIONS AND LICHENS In the five kingdom classification of whittaker there is known as mention of lichen and some a cellular organisms virus,viroids and prions. The virus are non cellular organisms that are characterized by having an in insert crystalline structure outside the living cell. The name virus that means venom or poisonous fluid was given by of the the Dimitri Ivanocosky 1892 recognise certain microbes as casual organisms of the the mosaic disease of tobacco. These were found to be smaller than bacteria because they are passed through bacteria proof filter. M.W. Beijerinek 1898 demonstrated that the the extract of the infected plants of tobacco could cause infection in healthy plants and called the fluids of contagium vivum fluidum (infectious living fluids). W.M. Stanley 1935 show that virus could be crystalline and crystals consists lajari of proteins. • virus are obligate parasite. • viruses are contains genetic mate