Question

Please give the long question answers (not brief) for Chapter 2 'MICROORGANISMS FRIEND AND FOE' Of DAV School

Answer 1

Most microorganisms are beneficial, for example, there are microorganisms in our large intestine that synthesise vitamins and allow them to be absorbed into the bloodstream. However, a tiny minority are pathogens(disease-causing agents). These pathogens, often called germs or bugs, are a threat to all life forms.

Microorganisms are very useful to us. ... (vii) Microorganisms are used to prepare vaccines for various diseases. (viii) They are useful for agriculture sector, as they enhance the fertility of soil by fixing nitrogen. (ix) They work as natural cleaners, as they decompose the dead bodies of plants and animals.

Microorganisms are useful as well as harmful also, in fact, some microbes are very helpful but most of them are harmful to living beings. 1. Some microorganisms are pathogens which cause diseases to human animals and plants. ... 3 Bacteria cause some diseases like cholera, typhoid, and diarrhea through water and food.