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Viruses are very small particles that can infect animals and plants and make them sick. Viruses are made up of genetic materials like DNA and are protected by a coating of protein. Viruses hijack the cells of living organisms. They inject their genetic material right into the cell and take over.
Viruses are made up mostly of a substance called nucleic acid surrounded by protein. On its own, a virus is lifeless. However, it becomes active when it infects, or enters, a cell of an animal or a plant.
19 paź 2023 · Viruses are tiny infectious agents that rely on living cells to multiply. They may use an animal, plant, or bacteria host to survive and reproduce. As such, there is some debate as to whether or not viruses should be considered living organisms.
25 sie 2018 · A virus is a chain of nucleic acids (DNA or RNA) which lives in a host cell, uses parts of the cellular machinery to reproduce, and releases the replicated nucleic acid chains to infect more cells.
1 sty 2021 · A virus is a very tiny organism that can only live and reproduce inside another living cell. The cell the virus invades is called the host cell. The virus basically turns the cell into a factory to make more viruses which then invade more cells.
When viruses get inside people's bodies, they can spread and make people sick. Viruses cause chickenpox, measles, flu, and many other diseases. Fungi (say: FUN-guy): These are multi-celled (made of many cells), plant-like organisms.
Coronaviruses are a family of viruses that affect animals. Occasionally, coronaviruses have been known to move from animals to humans. The coronavirus we’re talking about today is a new virus, which causes an illness called COVID-19. How did the coronavirus outbreak start?
