MAKING OF CURD AND BREAD You have learnt in Class VII that milk is turned into curd by bacteria. Curd contains several micro- organisms. Of these, the bacterium, Lactobacillus promotes t
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COMMERCIAL AND MEDICAL USE OF MICROORGANISMS Commercial use of microorganisms Microorganisms are used for the large scale production of alcohol, wine and acetic acid (vinegar). Yeast is used for
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VACCINE When a disease-carrying microbe enters our body, the body produces antibodies to fight the invader. The body also remembers how to fight the microbe if it enters again. If dead or weakened
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INCREASING SOIL FERTILITY AND CLEANING THE ENVIRONMENT Increasing soil fertility Some bacteria (Fig. 2.7) are able to fix nitrogen from the atmosphere to enrich soil with nitrogen and increase
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