1. A collection of system programs that controls and coordinates the overall operations of a computer system is called

2. The weight of an object on moon is____the weight of object on earth.

3. The place or environment where a plant or animal naturally or normally lives or grows is called:

4. The ozone layer is present in:

5. Excessive bleeding during an injury is because of the deficiency of:

6. The example of cold-blooded animal is/are:

7. Diseases spreading from person to person are called:

8. Which of the following produces seeds but no fruits?

9. Which atmospheric layer contains lons and helps in wireless communication?

10. The earth is closest to sun in:

11. Spanish Influenza of 1918-19 was caused by which influenza virus?

12. Night blindedness is caused due to the deficiency of:

13. Artificial noise is a:

14. A covalent bond is formed between two atoms when they:

15. Blue colour of sky is due to:

16. The energy which is unavailable in system is called:

17. The hottest planet of solar system is:

18. Rotation of earth is cause of:

19. Tropical Cyclones in China Sea are called?

20. A light sensitive device that converts drawing, printed text or other images into digital forms is called