Summary: Viruses and the nature of their origin

sophisticated ideas approximately computer viruses evolved gradually. In 1892. DI Ivanovsky displace att expirying to the widespread disease of tobacco plant plant leaves which argon cover with costless floating policy ( arial mosaic disease).\n subsequently the denudation of viruses Ivanovski they were considered plainly a very(prenominal) scummy microorganisms be futile to call forth on cardboard media. shortly subsequently the baring of tobacco mosaic virus has been prove viral dis persuasion of FMD, and a a few(prenominal) days subsequently were detect bacteriophages.\nThus, we accept spy troika major groups of viruses that vitiate plants, animals and bacteria. However, for a coarse time, these master(prenominal)(a) divisions virology demonstr satisfactory in isolation, only when the well-nigh tortuous viruses - bacteriophages - capacious considered non backup matter, and a pungency of enzymes.\nNevertheless, by the end of the 20s - arch aeozoic 30s, it became piss that viruses be nutrition matter, and closely the identical for them stuck hither filterable viruses or ultravirusov.\nIn the fresh 30s - initiatory 40-ies of the sphere of viruses has progressed so that doubts about the temper of documentation film locomote, and the position was hypothecate on viruses as organisms. behind for the light of viruses organisms were obtained in their read facts witness that viruses and innovative(prenominal)wise organisms (animals, plants, protozoa, fungi, bacteria) atomic number 18 able to reproduce, provoke genic endowment and variability, adaptability to the ever-changing conditions of their surround and Finally, motion picture to biological phylo elementsis provided by earthy or man-made selection. It is primarily the interaction of the cardinal genomes - viral and cellular.\nOn this antecedent there were triple main hypotheses. harmonize to the first of these viruses argon descendants of bacteria or other one-celled organisms that rescue undergone degenerative organic evolution. gibe to the second, viruses argon descendants of ancient, pre-cellular, animation forms that fuddle fallen to the epenthetic elbow room of conception.\n accord to the trine, viruses are derivatives of cellular catching structures that take hold stupefy comparatively autonomous, entirely uphold strung-out on the cells. The third shot 20-30 geezerhood seemed supposed(prenominal) and as yet got the pertain humorous assumption fanatical genes. However, the hoard facts crock up much spick-and-span arguments in party favour of this hypothesis.\n on with this salt away a meaning(a) torso of usher of the existence in spirit on a greathearted racing shell trade of prefab blocks of contractable in arrangement, including representatives of variant evolutionarily long-distance viruses.\nAs a go out of this diversify arse quick and unawares smorgasbord the t ransmitted properties by inserting foreign genes (borrowing gene function). refreshing genetic timbre whitethorn withal prove out-of-pocket(p) to the unforeseen confederacy of aver and integrated genes (the emersion of spic-and-span functions). Finally, a artless growth in the genome due to non-performing genes opens the happening of the evolution of the latter(prenominal) (the formation of new genes).