The Invisible Living World: Beyond Our Naked Eye
This chapter of the Class 8 NCERT Curiosity textbook opens the world of microorganisms too small to see. Bacteria, fungi, protozoa, algae and viruses are introduced through curd-setting, fermentation, antibiotic medicines and nitrogen fixation on the friendly side, and food spoilage, decay and infectious disease on the harmful side. Learners practise hygiene, safe food handling and vaccination as defences, discovering that these tiny beings shape harvests, health and history far beyond their size.
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