Microorganisms Friend and Foe Class 8 Part B | Class 8 Science Chapter 2 | Shakti Singh Sir

Microorganisms Friend and Foe Class 8 | Class 8 Science Chapter 2 | Shakti Singh Sir
In this video, Shakti Singh Sir will discuss as
0:00 Useful Microorganism
0:43 Commercial uses of micro organism
0:55 making curd and cheese
2:47 making alcohal
4:27 making bread
9:53 medicinal uses of microorganism
15:25 Nitrogen Fixation
20:50 nitrogen cycle
22:47 environmental uses of microorganism
25:30 harmful microorganism
25:50 pathogen
29:20 food poisoning
30:10 food spoil
32:30 food preservation






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