Viruses are not an organism at all. They are not alive. They are nonliving. They are like cockle burrs that "grab" hold of your clothing or a dog's coat. They are hijackers. Once they get attached to the cell of a living cell, they can take it over and "make" the living cell produce virus particles instead of cell parts. These parts can assemble into more viruses and then they break out of the cell (killing it) and begin the process again. They cannot make more viruses on their own.
They are very small and can be considered ultramicroscopic. We were not able to see them with the best light microscopes as we could bacteria (prokaryotes). We have to use an electron microscope to see them as they are that small. This was not available until recently. Since they are not alive they cannot be a life form.
Biological.
Neither - viruses do not eat. There are debates about whether viruses are a form of life, or organic structures that interact with living organisms.
No. A virus must attack a cellular life form in order to survive.
Not technically. The do not fulfil all the criteria that we consider to be indicitive of life.
yes, they are a life form. (there just a cell wall and a string of DNA =P)
Protista, such as Bacteria and Protozoa. examples include the Amoeba and Paramecium, and others. Viruses are not considered a true life form as they are l00% dependent on their host- and I believe cannot reproduce. The Protista- First Life, are aptly named.
The plural form of virus is viruses. It is not "viri".
Since viruses are not alive they can not have life processes.
Earths first life form may be non photosynthetic bacteria.
Yes, there are entities smaller than cells, such as viruses. Viruses are considered to be the smallest form of life and are essentially genetic material (DNA or RNA) contained within a protein coat. They require a host cell to reproduce and are not considered living organisms by all scientists.
The plural form of the word "virus" is spelled "viruses."
bartica