1. The rate of flow of charge is called

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

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

4. Bile is released by

5. Food for algae is

6. What is the name of our Galaxy

7. There are ...............major habitats.

8. By addition of what food becomes soft and fine

9. flowers are .................part of plant

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

11. The lightest part of atom is

12. In which waves particles of medium move perpendicularly

13. What is the unit of frequency

14. Blood is carried from lungs to heart by

15. The reverse process of peristalsis is called

16. Where are pollen grains located in

17. Sound can not pass through

18. Which circuit is used in domestic wiring

19. The largest artery is

20. Water is essential for