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1. Downy mildew disease is caused by :

 
 
 
 

2. Ovary is absent in :

 
 
 
 

3. In plants, the substances which accumulate around the site of infection are :

 
 
 
 

4. Which of the following statements is not correct?

 
 
 
 

5. Rigid cell wall and embryo formation characterise kingdom :

 
 
 
 

6. A disease is abnormal state that may result due to :

 
 
 
 

7. Which group of plants is called “Amphibians of Plant World”?

 
 
 
 

8. When the seeds are borne on megasporophylls and are not enclosed in a fruit, the plant belongs to :

 
 
 
 

9. Which of the following does not contain chlorophyll?

 
 
 
 

10. Ovules are not found enclosed in ovary in :

 
 
 
 

11. Late blight of potato is caused by :

 
 
 
 

12. Mixed cropping helps :

 
 
 
 

13. Banana bunchy top is caused by :

 
 
 
 

14. Which are non-seed-bearing vascular plants?

 
 
 
 

15. The inability of a plant to resist the effects of a pathogen or any other damaging factors is known as :

 
 
 
 

16. Club moss is the common name of :

 
 
 
 

17. A branch of science that deals with nature, symptoms, development and control of plant diseases is called :

 
 
 
 

18. Which of the following is a monocot?

 
 
 
 

19. Which of the following causes smut disease in cultivated plants?

 
 
 
 

20. A plant bears fruit, has a column of vascular bundle and a tap root system. This plant is a :

 
 
 
 

21. The disease symptom necrosis refers to :

 
 
 
 

22. In which group would you place a plant that reproduces by spores, develops embryo but plant body remains undifferentiated into root, stem and leaves?

 
 
 
 

23. ‘Snakes of Plant Kingdom’ is :

 
 
 
 

24. Multicellular and jacketed sex organs are found in :

 
 
 
 

25. A part of pathogen that is transmitted to the host is termed as :

 
 
 
 

26. Propagating materials like seeds, tubers, grafts and bulbs can be kept free of pathogens by :

 
 
 
 

27. If a disease appear on large scale after a long interval it is :

 
 
 
 

28. Maximum diversity of life forms occurs in :

 
 
 
 

29. Which one of the following is a monocot?

 
 
 
 

30. Fruits are not found in :

 
 
 
 

31. Red rot of sugarcane is caused by :

 
 
 
 

32. Severe famine of West Bengal of 1942-43 was due to destruction of rice crop by a fungus called :

 
 
 
 

33. The disease occurring more or less regularly from year to year in a particular locality is referred to as :

 
 
 
 

34. Rice, pea, potato are :

 
 
 
 

35. Atracheata term has been used by Oswald Tippo for :

 
 
 
 

36. Chief constituents of bordeaux mixture are :

 
 
 
 

37. There is a class of phenolic compounds produced by the host plant in response to fungal infections :

 
 
 
 

38. There are some dead and corky areas with definite margins on the stem, branches and fruits of lemon. This disease should be :

 
 
 
 

39. Small epidermal swellings due to infection are called :

 
 
 
 

40. Leaf spot of groundnut is caused by :

 
 
 
 

41. A plant which reproduces by spores, has vascular tissue but lacks flowers should belong to :

 
 
 
 

42. Liverworts are included in :

 
 
 
 

43. Quarantine regulations are concerned with:

 
 
 
 

44. The plants with soft and delicate stems, about a meter tall are known as :

 
 
 
 

45. The pathogen that causes covered smut of Sorghum is :

 
 
 
 

46. Seeds are characteristically found in :

 
 
 
 

47. An excessive enlargement of diseased organ because of increase in the number of cells is called :

 
 
 
 

48. In which of the following plants would you place heterotrophs like slime moulds, rusts, mushrooms, etc.?

 
 
 
 

49. Club moss and Peat moss belong to:

 
 
 
 

50. Citrus canker is caused by :

 
 
 
 

51. Oswald Tippo’s classification is:

 
 
 
 

52. Which among the following is a shrub?

 
 
 
 

53. Black rust of wheat is caused by:

 
 
 
 

54. Most primitive embryophytes are placed in :

 
 
 
 

55. The causal organism of early blight of potato is :

 
 
 
 

56. Pteridophytes are also known as :

 
 
 
 

57. Vascular tissue is found in :

 
 
 
 

58. Smut of maize is caused by :

 
 
 
 

59. Body disorders due to harmful physiological changes are known as :

 
 
 
 

60. Gymnosperms could also be called as:

 
 
 
 

61. All but one group are included in tracheophyta; which group is this :

 
 
 
 

62. Which one of the following belong to cryptogams only:

 
 
 
 

63. Vascular cryptogam is the term used for :

 
 
 
 

64. When a diseased plant is legally stopped from export, this is done under :

 
 
 
 

65. Pythium debaryanum is the causative agent of:

 
 
 
 

66. Cryptogams include :

 
 
 
 

67. Embryophyta includes :

 
 
 
 

68. Spermatophyta are characterized by producing:

 
 
 
 

69. Oswald Tippo’s classification was based on :

 
 
 
 

70. Ergot is obtained from :

 
 
 
 

71. Embryo formation is not known in :

 
 
 
 

72. Aflatoxin is produced as a product in :

 
 
 
 

73. Etiology includes the study of :

 
 
 
 

74. Which part of the plant is not affected by Albugo?

 
 
 
 

75. Which of the following plants does not belong to Embryophyta?

 
 
 
 

76. Leaves of pea show white powdery patches due to the growth of fungal mycelium with conidia and conidiophores. These are the symptoms of :

 
 
 
 

77. Chemicals which are applied soon after the outset of infection, suppress the development of pathogen, thus curing the plant, are called :

 
 
 
 

78. Which of the following is the most destructive enemies of mankind?

 
 
 
 

79. Which of the following does not help in penetration of pathogen into the host?

 
 
 
 

80. Which of the following are included in Tracheophyta?

 
 
 
 

81. Helminthosporium oryzae was the cause of disaster :

 
 
 
 

82. Which of the following is not a fungal disease?

 
 
 
 

83. Which of the following is not a correct match?

 
 
 
 

84. The smut mycelium which initiates the infection is usually :

 
 
 
 

85. Which of the following is not a viral disease?

 
 
 
 

86. Green plants are classified as :

 
 
 
 

87. Which of the following is the kingdom of multicellular producers?

 
 
 
 

88. A diseased leaf shows some areas with dead tissue. This symptom is often referred to as :

 
 
 
 

89. Who is known as ‘Father of Taxonomy’?

 
 
 
 

90. The scientist who is famous for his research on rust fungi in India is :

 
 
 
 

91. The tallest living gymnosperm tree in the world belongs to :

 
 
 
 

92. Which of the following organisms has characters of both animals and plants?

 
 
 
 

93. Bryophyta have been placed in cryptogams because:

 
 
 
 

94. A perennial that bears flowers and fruits once in a life time is known as :

 
 
 
 

95. When an infection is very wide in occurrence, it is called :

 
 
 
 

96. Red rot of sugarcane is caused by :

 
 
 
 

97. Woody climbers are known as :

 
 
 
 

98. According to Woese, fungi were placed in the domain :

 
 
 
 

99. Disease resistant plant varieties can be produced by :

 
 
 
 

100. A control measure prior to the appearance of a particular disease comes under :

 
 
 
 

101. Roots are absent in :

 
 
 
 


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