Question
Classify the following into friendly and harmful microorganisms. Yeast, malarial parasite, Lactobacillus, bread mould, Rhizobium, Bacillus anthracis.
Friendly
Harmful
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Answer

Friendly micro organisms The microbes which benefit humans and other organisms in one way on the other are considered as friendly microbes.
Friendly microorganisms
Harmful microorganisms
Yeast: Used in food industry where fermentation is required like bread making or wine and beer industries.
Malarial parasite: Cause malaria in host bodies.
Lactobacillus: Used in curd formation.
Bread mould: Spoils bread.
Rhizobium: Helps in fixing atmospheric nitrogen, increasing soil fertility. It is formed in the roots of leguminous plants.
Bacillus anthracis: Causes anthrax a highly infectious respiratory disease.

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