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Define virus.
Mention any three ways through which pathogens are transmitted.
Name the modes of transmission of communicable disease.
How do microorganisms help in agriculture?
What is fermentation?
What are communicable diseases?
Why is yeast used in the baking industry for making bread, cakes and pastries?
Explain canning.
Explain why antibiotics do not work against flu or any infection caused by viruses.
Explain how malaria is transmitted to humans.
Where are microorganisms found?
Explain various types of bacteria.
Why are viruses different from other microorganisms?
What are antibodies?
What are microorganisms?