8th Standard Science Chapter-3

1. Which of the following is a disease caused by protozoans

2. Which of the following diseases is caused by a bacteria?

3. Some plants have nitrogen-fixing bacteria in their root nodules. What are these bacteria called?

4. In order to take precautionary steps to control dengue, we must take measures to stop the breeding of:

5. Partial sterilization of a product such as milk at a high temperature is known as:

6. Living organisms which are invisible to the naked eye are called _________ .

7. Which of the following is a communicable disease?

8. Vaccines are made up of:

9. The bacterium present in curd is:

10. While baking cakes, yeast reproduces rapidly and produces ___ gas.