Water loss in liquid phase from the tip of the grass blades and leaves of herbaceous parts is called

  1. Evaporation
  2. Transpiration
  3. Guttation
  4. Solarization
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Following are some statements which ones are not incorrect?
a. Root pressure only provide a modest push in the overall process of water transport
b. Root Pressure obviously does not play a major role in water movement up tall trees
c. The greatest contribution of root pressure may be to re-establish the continuous chains of water molecules in the xylem which often break under the enormous tensions created by transpiration
d. Most of the plants meet their need by transpiratory pull
e. The exudate of guttation has pure water only
1. a,b,d,e
2. a,b,c,d
3. b,c,d,e
4. c,d,e

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Which of the following is an expected rate of upward flow in plants due to transpiratory pull?

  1. Up to 15 metres per hour
  2. Up to 15 meters per minute
  3. Up to 150 metres per hour
  4. Up to 200 metres per hour
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Which of the following is a model for Transpiration?

  1. Cohesion-AdhesionTranspiration Pull Model
  2. Cohesion Tension Transpiration Pull Model
  3. Tension Transpiration Pull Model
  4. All of these
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……….. of the water reaching the leaves is used in photosynthesis and plant growth

  1. More than 5 per cent
  2. Less than 1 per cent
  3. Less than 10 per cent
  4. More than 2 per cent
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Transpiration can be studied by

  1. Cobalt chloride paper test
  2. Chromium chloride paper test
  3. Leaf enclosed in polybag
  4. Both A and C
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The immediate cause of opening and closing of stomata is a change in the

  1. Turgidity of subsidiary cells
  2. Flexibility of aperture
  3. Change in the turgidity of guard cells
  4. All of these
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The inner wall of guard cell is not

  1. Thin
  2. Elastic
  3. Towards the pore or stomatal aperture
  4. All of these
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The opening of stoma is also…….due to the orientation of the microfibril in the …….

of guard cells.

  1. Supported, cytoplasm
  2. Supported, cell wall
  3. Affected, cell membrane
  4. Affected, cytoplasm
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Microfibril of Guard cells of stoma are not

  1. Made up of Cellulose
  2. Oriented radially
  3. Makes it more easy for stoma to open
  4. Found in cytoplasm
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