The first virus to exist is impossible to say. Microscopic life was not discovered until the invention of the microscope. Bacteria were discovered first because they are bigger than 400 nm (nanometres) in size. Viruses are far simpler and are usually between 20 and 250nm in size.
The first real work on viruses was done by Heinz Fraenkel-Conat in 1910 with his work on TMV (tobacco mosaic virus). This is one of the simplest viruses there is and the most studied.
Viruses are not considered to be living organisms by some biologists because ALL exist in a parasytic form (none fee living) and all rely on their host for reproduction. Others believe they are living organisms because they have an existence of their own separate to the host and are subject to natural selection. One hypothesis is that they are rouge pieces of DNA.
Viruses are too small to exist in the fossil record although there is evidence of their existence because of their effects on other animals and plants. This record goes back as far into the history of life on Earth as humans can go.
It proabably is true that a virus evolved first
viruses are specific to the cells they infect called host cells
well viruses are caused by bacteria and bacteria are cells. so yes
INTERFERON is a substance produced by body cells when they are attacked by viruses.
No. Viruses are not cells. They invade cells to get the materials to copy their DNA. Many people do not consider viruses to be truly alive.
No. Only white blood cells destroys pathogens, such as viruses.
Infect cells.
viruses dont have cells
No one knows yet how the first cell came about.
viruses live and breed inside cells
viruses, prokaryotic cells, eukaryotic cells
viruses are specific to the cells they infect called host cells
Yes, both viruses and cells have DNA.
No, tissues are made up of cells and viruses are not even cells.
Viruses need living cells to produce more viruses. They are obliged to use living cells.
well viruses are caused by bacteria and bacteria are cells. so yes
well viruses are caused by bacteria and bacteria are cells. so yes
INTERFERON is a substance produced by body cells when they are attacked by viruses.