1. Electron was discovered by?

2. The animals which kill and hunt other animals for food called

3. The international system of units was introduced in

4. What is present in gastric juice?

5. What is the largest gland in the human body?

6. Animals are divided into _ large subgroups

7. Hailey's comet is visible after every...............?

8. Leaves are narrow and pointed

10. Animals are called

11. Deficiency of vitamin_A results in?

12. The number of naturally occurring elements is

15. The valency of carbon atom is.............?

16. Cactus is found in

17. ....................... Is a friendly relationship between two organisms

18. Air contain.................. Nitrogen

19. Ded red blood corpuscles are stored in.......?

20. Boiling of an egg is change which is.............?

22. The speed of sound is........... Meter per second in iron

23. Plants are called

24. The study of Plants and animals is called

25. Rate of flow of charge is called

26. The largest artery is named as

27. Largest bird in the world is

28. The number of protons present in the nucleus of one atom of any element is called its

29. Algae Clour is

30. Voltmeter is used for measurement of............

31. The mirror used in the Automobiles are................?

32. The part of the solution which is less in quantity called

33. The whorl of sepals is called..........

34. The perpendicular force acting on unit surface area of an object is called...............?

35. According to ............. Law Resistance is calculated by dividing voltage by current

37. Gear system is an advanced shape of

38. Ability to do work is called

39. ............... React chemically with fat or oil to form soap

41. Bacteria are kept in separate kingdom called

42. Convection occurs only in.

43. The heaviest naturally occurring element is..............?

44. Dead plants and animals are

45. The biotic components of the environment Include..............

47. The formation of ghee from vegetable oil is an example of.............

48. ............... are reproductive organs of plants.

49. Rusting of iron involves...................?

50. Olfactory nerves links....... and...........