Botany MCQ Questions and Answers Quiz

91. 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

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

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

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

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

94. Which is not a green house gas?

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

95. 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

96. Which one is green manure

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

97. Which one is the major component of Bordeaux mixture

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

98. Which one of the following is natural insecticide

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

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

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

100. Which Pollutant causes leaf curling

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