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. 
Substance used to produce immunity against diseases in the living body is called
2. 
Which human diseases are caused by protozoa?
3. 
How much nitrogen is present in the atmosphere?
4. 
The gas released during the preparation of bread is
5. 
Common cold is caused by which type of microbe?
6. 
Which one of the following is not a method of food preservation?
7. 
Malaria is caused by which type of microbe?
8. 
An infectious disease is _________ .
9. 
Choose the way which are not responsible for the spread of communicable disease
10. 
__________ are the agents that act as carriers of a pathogen and spread diseases.

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