What is a virus and does it belong to a living system?

Viruses do not belong to living systems because viruses do not have a cellular structure.

And the most basic unit of living systems.

It's the cell. It is a non-cellular organism.

Virus, like all living things, has the ability of heredity, mutation and evolution, and is a very small and extremely simple life form.

Leaving the host cell, it is just a large chemical molecule, stop moving, can be made into protein crystallization, for an inanimate body, when it encounters the host cell, it will show typical life characteristics by adsorption, entering, replicating, assembling, and releasing the daughter virus, so the virus is a primitive life between living and non-living things.

Hello, a virus is a non-cellular organism with a tiny, simple structure, containing only one nucleic acid, which must parasitize in living cells and reproduce by replication. It is a non-cellular life form that consists of a nucleic acid and protein shell. Although viruses do not have metabolic mechanisms and enzyme systems, they can complete life activities through host cells and reproduce to produce a new generation of viruses.

The life process of a virus is roughly divided into five steps: adsorption, injection (genetic material), synthesis, assembly, and release.

Viruses do not belong to any one level of the living system.

The most basic of the structural hierarchy of living systems is the cell.

So can a virus be counted as a living organism?"Individuals"This level?

A: No, you cannot.

Viruses do not belong to living systems because viruses do not have a cellular structure, and the most basic unit of a living and scattered system is the cell. It is a non-cellular organism.

Virus, like all living things, has the ability to heredize, mutate and evolve, and is a very small life form with an extremely simple structure.

Leaving the host cell, it is just a large chemical molecule, stop moving, can be made into protein crystallization, for an inanimate body, when it encounters the host cell, it will show typical life characteristics by adsorption, entering, replicating, assembling, and releasing the daughter virus, so the virus is a primitive life between living and non-living things.

Viruses have the six basic characteristics of living organisms, so they are living organisms, but the realization of all life activities of viruses must depend on living cells, once they leave living cells, they cannot survive and complete various life activities, so they do not belong to the living system.

Viruses can only parasitize in living cells, and if they leave the cells, the virus is in a crystalline state and presents non-living characteristics. Therefore, the life activity of the virus must depend on its parasitic living cells.

According to the theory of textbooks, viruses have no cell structure, and only in living cells can life activities occur, so viruses are only living organisms, without life, and therefore do not belong to living systems.

However, it is still in doubt whether the virus has life, and the definition of life itself is controversial, Engels pointed out in "Dialectics of Nature": "Life is the mode of existence of the proteosome, and the basic factor of this mode of existence lies in its constant metabolism with the surrounding external nature."

Shakyamuni Buddha's definition of life with the Buddha's eyes is: oviparous, viviparous, wet, incarnated, colored, colorless, thoughtful, non-thoughtful, non-thoughtful, non-non-unthinking. Shortly before Sagan's unexpected death, he defined life as "any system capable of replication, mutation, and mutation."

This means that life is characterized by an entity that allows for variation from generation to generation through the evolutionary mechanism of natural selection, and that it is able to reorganize its own characteristics through reproduction to make the next generation more life.

In conclusion, the main characteristic of life is its ability to replicate itself. The structure of the virus is simple, consisting of a protein shell and internal genetic material, and there is no cellular structure. It can only live in living cells.

Relying on the genetic information in one's own genetic material, they use the material inside the cell to create new viruses. That's how it reproduces.

Therefore, viruses are alive and should belong to living systems, but according to the theory of textbooks, they cannot be regarded as living systems.

To answer this question, we must first understand the definition of a living system: the highest form of a natural system is a system that can independently exchange matter and energy with its environment, and on this basis, realize internal order, development and reproduction.

The virus can only live in cells and cannot exchange with its surroundings independently, so it is not a living system. A virus does not have a cellular structure, but it can carry out life activities such as genetics, replication, etc., so it belongs to living organisms.