Define viruses . Give some important characteristic features of viruses . Also name any two common disease caused by viruses .
Answers
Answer:
•A virus is a submicroscopic infectious agent that replicates only inside the living cells of an organism. Viruses infect all types of life forms, from animals and plants to microorganisms, including bacteria and archaea.
•They are acellular, that is, they contain no cytoplasm or cellular organelles. They carry out no metabolism on their own and must replicate using the host cell's metabolic machinery. In other words, viruses don't grow and divide. Instead, new viral components are synthesized and assembled within the infected host cell.
•Viruses cause familiar infectious diseases such as the common cold, flu and warts. They also cause severe illnesses such as HIV/AIDS, Ebola, and COVID-19. Viruses are like hijackers. They invade living, normal cells and use those cells to multiply and produce other viruses like themselves.
Explanation:
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Answer:
a living thing too small to be seen without a microscope that cause disease in human, animals, and plants.
important characteristics are
1. non living structure
2. non cellular
ex are flu, common cold
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