--%>
Assignment Help - homework help

  Viruses

Viruses:

Introduction:

Viruses are still biologist’s puzzle since they show both living and non-living characters. Therefore viruses are considered as a separate entity. It is not taken into account in Whittaker’s five kingdom categorization. Viruses are now stated as ultramicroscopic, disease causing intra cellular obligate parasites.

Brief history of discovery:

Viruses were not recognized to biologists for a long time due to their ultramicroscopic structure however their presence was obvious by infectious diseases that were confirmed not due to bacteria. It attracted the concentration of investigators only in the nineteenth century when a virus termed as tobacco mosaic virus (TMV) caused rigorous damage to commercially significant tobacco crop.

Mayer explained that the disease could be transmitted merely by applying the sap of contaminated leaf to the leaf of healthy plant. He thought that the disease was due to bacteria.  It was the Russian biologist Iwanowsky (1892) who explained that the sap of infected leaves even after passing via bacterial filter remained infective, ruling out the bacterium as the causative agent. Dutch microbiologist Beijerinck (1898) verified the findings of Iwanowsky and termed the fluid “contagium vivum fluidum” that means contagious living fluid. This was later on termed as virion (i.e., poison) and the disease causing agent as virus. The American biochemist W.M. Stanley (1935), isolated virus in crystalline form and explained that even in that state it sustained the infectivity. This marked the starting of a new branch of science termed as virology.

 

Latest technology based Biology Online Tutoring Assistance

Tutors, at the www.tutorsglobe.com, take pledge to provide full satisfaction and assurance in Viruses homework help via online tutoring. Students are getting 100% satisfaction by online tutors across the globe. Here you can get homework help for Viruses, project ideas and tutorials. We provide email based Viruses homework help. You can join us to ask queries 24x7 with live, experienced and qualified online tutors specialized in Viruses. Through Online Tutoring, you would be able to complete your homework or assignments at your home. Tutors at the TutorsGlobe are committed to provide the best quality online tutoring assistance for Biology homework help and assignment help services. They use their experience, as they have solved thousands of the Biology assignments, which may help you to solve your complex issues of Viruses. TutorsGlobe assure for the best quality compliance to your homework. Compromise with quality is not in our dictionary. If we feel that we are not able to provide the homework help as per the deadline or given instruction by the student, we refund the money of the student without any delay.