1. The rate of flow of charge is called

2. Human heart has ...............chambers

3. Which circuit is used in domestic wiring

4. which of the following is not used in human respiratory system

5. Where are pollen grains located in

6. Blood is carried from lungs to heart by

7. The largest artery is

8. There are ...............major habitats.

9. Bile is released by

10. Food for algae is

11. flowers are .................part of plant

12. What is the name of our Galaxy

13. By addition of what food becomes soft and fine

14. The lightest part of atom is

15. Water is essential for

16. What is the mode of  transferring of heat for energy of sun reaching  us

17. In which waves particles of medium move perpendicularly

18. Sound can not pass through

19. The reverse process of peristalsis is called

20. What is the unit of frequency