Microorganisms and Its Effects on Our Lives

Microorganisms also known as microbes are minute organisms that cannot be seen with naked eye. They can only be seen with the help of a microscope. Certain microbes such as fungi and bacteria are beneficial while others such as viruses are harmful. Microorganisms are grouped based on the following criteria: Size, Shape, Method of Reproduction, Nutrition and Habitat.

Microorganisms and Its Effects on Our Lives

By Mr Ghaz, October 3, 2010

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Microorganisms and Its Effects on Our Lives

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Classification of Microorganisms

Microorganisms also known as microbes are minute organisms that cannot be seen with naked eye. They can only be seen with the help of a microscope.

Microorganisms are classified into 5 groups: Bacteria, Viruses, Protozoa, Algae and Fungi.

Certain microbes such as fungi and bacteria are beneficial while others such as viruses are harmful.

Microorganisms are grouped based on the following criteria: Size, Shape, Method of Reproduction, Nutrition and Habitat.

Bacteria

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Bacteria are very simple unicellular organisms which are the most abundant organisms on earth. For example, 1 gram of fertile soil can contain as much as 25 thousand million bacteria.

The size of bacteria vary from 0.2 µm to 10 µm (1 micrometer (µm) = 10¯6 meter; micrometer is also known as micron).

Bacteria are found in damp places and are present in soil, air, water, plants and animals.

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General structure of a bacterial cell (bacterium)

The structure of a bacterial cell consists of the following:

a) a cell wall which is made up of proteins and polysaccharides is responsible for maintaining the shape of the cell.

b) a cell membrane which is semi=permeable that controls the movement of substances in and out of the cell

c) cytoplasms which contain glycogen granules, fats and protein.

d) the nucleus of the bacteria is not obvious. The genetic material which consists of deoxyribonucleic acid (DNA) is embedded inside the cytoplasm and is not enclosed by a nuclear membrane.

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6 Responses to “Microorganisms and Its Effects on Our Lives”
  1. Simran Kaur Says...

    On October 3, 2010 at 10:13 am

    right said


  2. albert1jemi Says...

    On October 3, 2010 at 11:48 am

    cool one


  3. GodsGrace Says...

    On October 3, 2010 at 12:09 pm

    Good Post


  4. CHAN LEE PENG Says...

    On October 3, 2010 at 12:11 pm

    Microorganisms can be helpful and harmful to human. :-)


  5. papaleng Says...

    On October 4, 2010 at 8:42 am

    Wow! excellent post.


  6. omar faaberg Says...

    On October 25, 2010 at 11:47 am

    interesting!


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