microorganism are viruses live or dead?

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Consider that some bacteria can exist in two forms, and active and dormant, where the dormant form is effectively "dead," or as other posters have noted, "non-living."  Under the correct conditions, it becomes active and alive -- much lthe same like the virus.

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There is a difference between non-living and dead.  In order to be dead, you have to have once been alive.  Perhaps a better way to look at this would be that a virus is itslef not a living being, but it needs a living being to survive.

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One life function that all living things carry out is reproduction. Since viruses must invade a host cell and take over the host's reproductive machinery in the cell to make more viruses, it is not technically a living thing. However, it does have its own genetic code of RNA or DNA, surrounded by a protein coat.

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The answer depends on what state the virus is in. If the virus is simply its own cell, not attached to another non-viral cell, it is dormant and not "alive." Once the viral cell attaches to another non-viral cell, then it becomes "active" and can be considered a living cell.

Therefore, on its own (simply DNA or RNA surrounded by a protein shell), it is not technically "alive." It is only when it joins with a host cell that it is able to live and reproduce.

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Viruses are classified as non-living by most scientists. They do not breathe, eat, or do anything at all, really. When a virus attaches to a living cell, the attachment is a mechanical one, like a key fitting into a lock; the virus does not have to "do" anything to attach. Although a virus can take over the functioning of a living cell, that alone does not mean that it is alive. Many chemical toxins change the way a cell acts, too, and they are not alive. While the interaction between a virus and a host cell is complex, only the host cell is living. The virus is more like a robot.

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