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Microorganisms and their features

Posted on : 28 Dec 2019

Views: 2310

  • Water and soil are full of tiny organisms, though not all of them fall into the category of microbes.
  • These microorganisms or microbes are so small in size that they cannot be seen with the unaided eye.
  • Some of these, such as the fungus that grows on bread, can be seen with a magnifying glass. Others cannot be seen without the help of a microscope.
  •  Microorganisms are classified into four major groups. These groups are bacteria, fungi, protozoa and some algae.
  • Microorganisms may be single-celled like bacteria, some algae and protozoa, or multicellular, such as many algae and fungi.
  • Viruses are also microscopic but are different from other microorganisms. They, however, reproduce only inside the cells of the host organism, which may be a bacterium, plant or animal.
  • Common ailments like cold, influenza (flu) and most coughs are caused by viruses. Serious diseases like polio and chicken pox are also caused by viruses. Diseases like dysentery and malaria are caused by protozoa (protozoans) whereas typhoid and tuberculosis (TB) are bacterial diseases.
  • They live in all types of environment, ranging from ice cold climate to hot springs; and deserts to marshy lands. They are also found inside the bodies of animals including humans. Some microorganisms grow on other organisms while others exist freely.

Article Related Questions

  1. Which of the following statements are correct regarding Microorganisms?
    1.They cannot be seen with the unaided eye.
    2.They are single-celled creatures only.
    3.They can live in all types of environment.
    Select the correct answer using the code given below:

  2. 1.1 and 2 only

    2.2 and 3 only

    3.1 and 3 only

    4.1, 2 and 3

    Right Ans : 1 and 3 only

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