1. The organs which are similar because of their origin but differ in function are called:

2. Flipper of whales, wings of bat and arms of man are considered as:

3. The study of chemical processes of living organisms is called:

4. The study of cell structure and function is called:

5. The final tool for classification is:

6. Homology, cytology, biochemistry and genetics are the tools which help in:

7. The basic unit for classification is:

8. The group of organisms having common physical characters are called:

9. The closely related species are grouped together to form:

10. Genera are grouped together to form:

11. Families are grouped together to form:

12. Orders are grouped together to form:

13. Classes are grouped together to form:

14. Phyla are grouped together to form:

15. Five kingdoms classification was proposed by:

16. Five kingdoms classification of Whittaker was modified by:

17. The body of virus is composed of:

18. In virus nucleic acid is surrounded by a protein coat called:

19. Lysogenic stage of reproduction occurs in:

20. Lytic cycle of virus is completed in the body of:

21. Polio, smallpox, influenza and measles are caused by:

22. Tobacco mosaic disease is caused by:

23. The inner part of virus composed of nucleic acid is called:

24. Capsid is made up of subunits called:

25. Tail fibres are present in:

26. The smallest virus made up of RNA molecules without capsid and envelope is called:

27. A viral cycle which causes death of host cell is called:

28. The viral cycle in which viral genome replicates without destroying host cell is called:

29. Prophage is considered as:

30. Cold disease is caused by:

31. Arthropod-borne viruses are called:

32. Yellow fever, encephalitis and dengue diseases are caused by:

33. HIV belongs to the group:

34. Rabies is caused by:

35. Measles and mumps are caused by:

36. Rabies is also called:

37. The virus entering the body through dog bite causes:

38. The virus living in saliva of infected person is:

39. AIDS is caused by:

40. Immune deficiency occurs in:

41. Skin cancer is a symptom of:

42. Septicaemia is also called:

43. Skin cancer is also called:

44. Skin cancer, blood poisoning, memory loss and brain shrinkage are symptoms of:

45. Azidothymidine, Ribavirin and Suramin drugs are used for treatment of:

46. Jaundice, abdominal pain and liver enlargement are symptoms of:

47. Hepatitis A is caused by:

48. Hepatitis B is caused by:

49. HIV is transmitted by:

50. Transmission of AIDS occurs through:

51. HIV destroys in the human body: