Well... a virus is "an infective agent that typically consists of a nucleic acid molecule in a protein coat, is too small to be seen by light microscopy, and is able to multiply only within the living cells of a host."(Google's dictoanry system) so if the organism has nucleic acid and uses a host cell to reproduce then it is technically a virus. An easy way to tell is look at the classes of viruses and see if the organism follows any of the seven classes (ex. HIV is a class VI virus, SARS is a class IV virus)
Well... a virus is "an infective agent that typically consists of a nucleic acid molecule in a protein coat, is too small to be seen by light microscopy, and is able to multiply only within the living cells of a host."(Google's dictoanry system) so if the organism has nucleic acid and uses a host cell to reproduce then it is technically a virus. An easy way to tell is look at the classes of viruses and see if the organism follows any of the seven classes (ex. HIV is a class VI virus, SARS is a class IV virus)
There is debate over whether a virus is a living organism or not. Like organisms it evolves, reproduces but a virus does not have its own metabolism.
A bacillus does not refer to the shape of a virus. The capsid of a virus is what determines the shape of a virus.
A host.
host
It will destroy cells in the organism
Microorganism means very small sized organism. It can not be seen with naked eye. You have to use microscopes to see it. Polio virus is a virus. Virus are too small as compared to other microorganisms. So polio virus is included in the category of the microorganisms.
A parasite is any organism that lives on or in another organism, not necessarily a fungus, virus or bacteria.
virus
It will destroy cells in the organism
host
It will destroy cells in the organism
It will destroy cells in the organism