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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.
What else can I help you with?
Are viruses general or specific to the cells that they infect?
viruses are specific to the cells they infect called host cells
When body cells are attacked by viruses they produce what?
INTERFERON is a substance produced by body cells when they are attacked by viruses.
Are viruses made out of a cell or cells?
well viruses are caused by bacteria and bacteria are cells. so yes
Viruses are single celled organisms?
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.
Do red blood cells destroy viruses in your body?
No. Only white blood cells destroys pathogens, such as viruses.
What did the first viruses do?
Infect cells.
Are viruses old prehistoric cells or are they highly evolved cells?
viruses dont have cells
Where do cells come from And if the cell came from the other cells then where does the first cell come from?
No one knows yet how the first cell came about.
Are viruses general or specific to the cells that they infect?
viruses are specific to the cells they infect called host cells
Is genetic material found in both cells and viruses?
Yes, both viruses and cells have DNA.
Are viruses made up of tissues?
No, tissues are made up of cells and viruses are not even cells.
Are viruses smaller than eukaryotic cells?
Yes, viruses are smaller than eukaryotic cells.
Why do you classify viruses as obligatory intracellular parasite?
Viruses need living cells to produce more viruses. They are obliged to use living cells.
When body cells are attacked by viruses they produce what?
INTERFERON is a substance produced by body cells when they are attacked by viruses.
Are viruses made out of a cell or cells?
well viruses are caused by bacteria and bacteria are cells. so yes
Are viruses made of a cell or cells?
well viruses are caused by bacteria and bacteria are cells. so yes
Which organelle came first, mitochondria or chloroplasts?
Mitochondria came first before chloroplasts in the evolution of eukaryotic cells.
