What forms of life exist on earth? What organisms are non-cellular life forms?

1. What forms of life exist on earth? 2. What organisms are non-cellular life forms? 3. Name the signs of a living organism characteristic of viruses. 4. What important property of living organisms is not typical for viruses? 5. Into which two groups are viruses divided according to their structure? 6. What is the structure of a simple virus? 7. How is a complex virus different from a simple one? 8. How are viruses different from bacteria? 9. Name two ways viruses enter the cell. 10. What does the virus use to synthesize its proteins? 11. What diseases are caused by viruses?

All life forms are divided into non-cellular and cellular.
Non-cellular organisms are viruses and bacteriophages.
The signs of a living organism for viruses are the ability to reproduce, variability, adaptation.
Viruses cannot multiply by binary fission, that is, multiply by splitting in two. They reproduce through the reproduction of genetic material in the host cell.
By structure, all viruses are divided into two groups: DNA-containing and RNA-containing.
The structure of a simple virus: nucleic acid and protein coat.
A complex virus differs from a simple one in that, in addition to these elements, it can contain a membrane, carbohydrates and non-structural proteins.
Viruses, unlike bacteria, do not have a cellular structure.
The virus can enter the cell in two ways: pinocytosis and fusion of the viral envelope with the cell membrane.
To synthesize proteins, the virus uses the biochemical apparatus of the host cell.
Due to viruses, diseases such as colds, flu, smallpox, rubella, and AIDS occur.

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