1. Bile is released by

2. Which circuit is used in domestic wiring

3. Water is essential for

4. Human heart has ...............chambers

5. Sound can not pass through

6. The rate of flow of charge is called

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

8. The lightest part of atom is

9. What is the unit of frequency

10. flowers are .................part of plant

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

12. Where are pollen grains located in

13. By addition of what food becomes soft and fine

14. There are ...............major habitats.

15. Blood is carried from lungs to heart by

16. The reverse process of peristalsis is called

17. Food for algae is

18. The largest artery is

19. In which waves particles of medium move perpendicularly

20. What is the name of our Galaxy