Organisms who use another organism to flourish are called parasites.
virus
It is a virus: HIV (Human Immunodeficiency Virus).
A virus is an organism that only carries out one life activity. This activity is known as reproduction. The study of viruses is called virology.
The host cell does not benefit from having a virus. The virus usually kills it.
The smallest organism to do so is called a virus
A host.
host
A parasite is any organism that lives on or in another organism, not necessarily a fungus, virus or bacteria.
virus
This is the host (organism) and the cell is called the host cell.
If you count bacteria and viruses, a virus tends to feed off bacteria.
A weakened or modified virus that is introduced into an organism to stimulate immunity is called a vaccine.
Polio is a word that can mean one of two things, the virus or the disease The Polio disease which you are referring to is called poliomyelitis. The organism that causes it is a viral organism (virus). The name of the virus that causes poliomyelitis (polio disease) is called Poliovirus. The virus is a normal RNA virus from the Picornaviridae and genus enterovirus family.
A parasite is an organism that lives in or on another organism (the host) and benefits by deriving nutrients at the host's expense. A virus is a form of parasite.
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.
bacterica is one of them, virus is another and I'm not sure on the rest
A HOST is an organism that provides a source of energy for a virus or another organism. CREDIT FROM: NORTH CAROLINE 8TH GRADE PRENTICE HALL SCIENCE EXPLORER