Botany MCQs Quiz Multiple Choice Questions & Answers Page 2

51. Urea is a source of

1. Phosphorous
2. Nitrogen
3. Potassium
4. All of the above

52. Water blooms are formed by

1. Lemna
2. Hydrilla
3. Water hyacinth
4. Planktonic algae.

53. Water logging of soil makes it physiologically dry because

1. This condition does not allow the capillary force to work
2. this condition does not allow oxygen to enter the soil
3. both a and b
4. none of these

54. What is the area in floriculture (in 1000 hectare) in India

1. 40 - 50
2. 60 - 80
3. 100 - 120
4. None of these

55. Which gas of the atmosphere holds up ultraviolet rays ?

1. O2
2. O2
3. N2
4. CO2.

56. Which is not a green house gas?

1. CFC
2. CH4
3. CO
4. H2

57. Which is not applicable to vegetatively propagated plants

1. To get true to type plants
2. To protect an elite quality
3. To conserve a plant
4. To get a new type of plant

58. Which one is green manure

1. Sesbania
2. Rice
3. Oat
4. Maize

59. Which one is the major component of Bordeaux mixture

1. Copper sulphate
2. Sodium chloride
3. Calcium chloride
4. Magnesium sulphate

60. Which one of the following is natural insecticide

1. Pyrethrum
2. Nicotine
3. both a and b
4. None of these

61. Which one of the following is normally not an atmospheric pollutant ?

1. CO
2. CO2
3. SO2
4. Hydrocarbon.

62. Which Pollutant causes leaf curling

1. CO
2. H2S
3. O3
4. SO2

63. World Environment Day is

1. 28th February
2. 5th June
3. 7th August
4. 10th April

64. A common example of stem tuber is

1. Ginger
2. Garlic
3. Onion
4. Potato

65. A green house gas is

1. H2
2. CO
3. CO2
4. N2.

66. A low branch with a node is bent down and covered with soil in

1. Marcotting
2. Layering
3. Cutting
4. Budding

67. A plant breeder: waists to develop a disease resistant variety. What should he do first?

1. Hybridisation
2. Mutation
3. Selection
4. Production of crop

68. A variety or strain produced by horticultural or agricultural techniques and not normally found in natural population is called

1. Hybrid
2. Tissue culture
3. GMO
4. Cultivar

69. Acid rain is caused by

1. SO2 and NO2
2. SO2 and CO
3. NH3 and CO
4. SO2 and NH3.

70. Advantages of Artificial Methods of Vegetative Reproduction include

1. Crops with better quality
2. Crops with more yield
3. Ability to produce plants with desirable qualities
4. All of these

71. Aims of plant breeding are to produce

1. Disease-free varieties
2. High-yielding varieties
3. Early-maturing varieties
4. all of the above

72. Air pollution effects are usually found on

1. Flowers
2. Leaves
3. Stems
4. Roots.

73. Algal bloom results in

1. Global warming
2. Salination
3. Eutrophication
4. Biomagnification

74. Anxiety and stress are caused by

1. Air pollution
2. Noise pollution
3. Water pollution
4. Nuclear pollution

75. Artificial methods of reproduction do not include

1. Rhizome
2. cutting
3. layering
4. budding

76. Artificial methods of vegetative propagation includes

1. Cloning
2. grafting
3. cuttings
4. both b and c

77. Automobile exhaust gas that causes major respiratory problem is

1. CO
2. CH4
3. NO2
4. Chlorine.

78. Banana is propagated by

1. Stem cutting
2. Tillers
3. Suckers
4. Crown

79. Basic taxonomic unit is

1. Kingdom
2. Genus
3. Species
4. Order

80. Binomial nomenclature means writing the name of plant in two words which designate

1. Order and Family
2. Family and genus
3. Species and variety
4. Genus and species

81. Bioherbicides have been recommended

1. To prevent eco-degradation
2. Because of their ready availability
3. Because of their cheap rates
4. Because of their abundance

82. BOD is connected with

1. Organic matter
2. microbes
3. Microbes and Organic matter
4. None of the above.

83. Cadmium damages

1. Heart
2. Lungs
3. Stomach
4. Liver and Kidneys.

84. Carbon monoxide is pollutant as it

1. Inactivates nerves
2. Inhibits glycolysis
3. Combines with oxygen
4. Combines with haemoglobin.

85. Carbon monoxide kills because it destroys

1. Haemoglobin
2. Phytochrome
3. Cytochrome
4. Both a and b.

86. Chief air pollutant which is likely to deplete ozone layer is

1. Sulphur dioxide
2. Carbon dioxide
3. Carbon monoxide
4. Nitrogen oxides and Fluorocarbons.

87. Classical taxonomy is also termed

1. Beta taxonomy
2. Systematic
3. Descriptive taxonomy
4. Experimental taxonomy

88. Coacervates were experimentally produced by

1. Oparin and Haldane
2. Darwin
3. Aristotle
4. Louis Pasture

89. Coacervates were formed by

1. DNA
2. Radiations
3. Polymerization
4. Polymerisation and aggregation

90. Component of smog

1. O3
2. PAN
3. PPN & PAN
4. Both a and b

91. Composted manure is produced from

1. Farmyard manure and green manure
2. Farm refuse and household refuse
3. Organic remains of biogas plants
4. Rotten vegetables and animal refuse

92. Considering corms of natural vegetative propagation, buds are present at

1. Front side of corm
2. Backside of corm
3. Top of corm
4. End of corm

93. Cryopreservation is a technique used for

1. Crystallization of food
2. Food packing
3. Seed saving
4. Preservation of excess production of vegetables

94. Cutting is not suitable for

1. Lime
2. Sugar-cane
3. Oleander
4. Tapioca

95. Disadvantages of natural vegetative propagation includes

1. lack of dispersal mechanisms
2. no fertilization is involved
3. area is quickly colonized
4. daughter plants can grow quickly

96. Eutrophication results in reduction of

1. Dissolved nitrate
2. Dissolved Oxygen
3. Mineral salts
4. Parasitic protozoa.

97. Example of natural vegetative propagation does not include

1. Corals
2. bulbs
3. corms
4. rhizomes

98. Example of plant in which vegetative propagation is occurred by leaves is called

1. Cannabisn
2. Chrysanthemum
3. Cryophyllum
4. Brassica

99. Examples of Corm include

1. Gloriosa
2. Canna
3. Lallang
4. Ginger

100. External agencies are not required in

1. natural vegetative propagation
2. sexual reproduction
3. bisexual reproduction
4. trisexual reproduction