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

2. 
An infectious disease is _________ .

3. 
Which human diseases are caused by protozoa?

4. 
How much nitrogen is present in the atmosphere?

5. 
Choose the way which are not responsible for the spread of communicable disease

6. 
Common cold is caused by which type of microbe?

7. 
Malaria is caused by which type of microbe?

8. 
Which one of the following is not a method of food preservation?

9. 
The gas released during the preparation of bread is

10. 
Substance used to produce immunity against diseases in the living body is called

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