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Science Class 8- Chapter 2- Microorganisms: Friend and Foe – Quiz 6

10 Questions, each question is of 1 mark. No negative marking. Full Marks=10.

1. 
How much nitrogen is present in the atmosphere?

2. 
Which one of the following is not a method of food preservation?

3. 
Malaria is caused by which type of microbe?

4. 
Choose the way which are not responsible for the spread of communicable disease

5. 
Substance used to produce immunity against diseases in the living body is called

6. 
An infectious disease is _________ .

7. 
Which human diseases are caused by protozoa?

8. 
__________ are the agents that act as carriers of a pathogen and spread diseases.

9. 
Common cold is caused by which type of microbe?

10. 
The gas released during the preparation of bread is

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