Answer:
Explanation:
Bacteria are very tiny organisms that are present everywhere. Bacteria are single celled microorganisms . Their cell structure is unique and they don't have nucleus .
Interesting facts about bacteria :
- There are around 40 million bacteria in a gram of soil .
- Bacteria can survive in even very harsh conditions like deep areas of earth crust and in radioactive waste.
- Some bacteria have chemicals that can generate light . This process is called bio-luminescence.
- Many bacteria are present in human body.
- Bacteria also help the environment by treating sewage .
Viruses are very small particles that can infect animals and plants . Viruses are made up of genetic materials like DNA and are protected by a coating of protein.
Interesting facts about viruses :
- Viruses are not classified in any of the five kingdoms of living organisms.
- Most of the viruses are so small that they cannot be seen even with an optical microscope.
- The first human virus discovered was yellow fever virus in 1901.
- A virus that contains RNA instead of DNA is sometime called a retrovirus.
- The word virus comes from Latin word " virulentus " meaning " poisonous " .
