Microbes need moisture, air and the right temperature to grow. If any one of these is removed, their growth can be stopped or slowed, which is the basic idea behind many food preservation methods. Class 5 Environmental Studies Grade 5 Chapter ...
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Oil forms a protective layer over pickles, preventing air from reaching them. Without air, microbes cannot grow, so the pickles stay fresh, safe and tasty for months. Class 5 Environmental Studies Grade 5 Chapter 3 The Mystery of Food solutions CBSE Class ...