what is the difference between a …

Virus:- -- virus is a Greek word which means "Poision". -- this tern was given by Ivanowsky . -- the first discovered virus is Tobbaco Mosaic Virus (TMV- Plant Virus) -- Stanley Millar Cristlaized (1935) -- Bijjerimk called " Contagium Vivum Fluidum " . -- virus are acellular, microscopic (smaller than bacteria) organism . -- virus are commenting link between living and non-living. - they are made up of (Nucleo Protein) (1) nuclic acid either DNA or RNA (2) protein coat capsomere . -- they are inert / inactive / non-living outside the cell . -- virus are nucleo protein. -- Virus may affect any living cell . -- virus are obligate parasite -- these are in haxagonal shape . Viroids:- --Discovered by T.O. Dinner(1971) -- smaller than virus . -- they are only infactious nuclic acid -- proteins are absent -- low molecular weight than virus