ANSWER THE FOLLOWING:- 1.What do you mean by food spoilage? 2. What role does sugar play in the preservation of food? 3.How are carriers harmful to us? 4. What is vaccination? 5. What do you mean by immunity? 6. Give two examples of each of the following types of microorganisms (a) Algae (b) Fungi (c) Protozoa 7.What are antibodies? 8. What is the role of bacteria in increasing soil fertility? 9. Explain why antibiotics do not work against flu or any infection caused by viruses. 10.Mention any three ways through which pathogens are transmitted
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