1. Where are pollen grains located in

2. The rate of flow of charge is called

3. Bile is released by

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

5. In which waves particles of medium move perpendicularly

6. The reverse process of peristalsis is called

7. Blood is carried from lungs to heart by

8. Which circuit is used in domestic wiring

9. Human heart has ...............chambers

10. There are ...............major habitats.

11. By addition of what food becomes soft and fine

12. Water is essential for

13. Food for algae is

14. What is the name of our Galaxy

15. What is the unit of frequency

16. Sound can not pass through

17. The lightest part of atom is

18. The largest artery is

19. flowers are .................part of plant

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