Question
What are the major groups of microorganisms ?

Answer

Microorganisms are divided into four major groups which are as follows
(i) Bacteria These are single-celled organisms having rigid cell was like plant cells. Diseases like typhoid and tuberculosis (TB) are caused by bacteria.
(ii) Fungi These are non-green organisms which obtain their food from the dead organic matter.
(iii) Protozoa These are unicellular animals which cause diseases like malaria and dysentery.
(iv) Algae These are photoautotrophic organisms, that may be unicellular or multicellular.

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