The value of osmotic potential of an electrolyte is always

(1) more than non-electrolyte 

(2) less than non-electrolyte 

(3) same as non-electrolyte 

(4) None of these

Subtopic:  Osmosis |
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Identify the process taking place in this experiment.

(1) Ringing experiment for translocation of sap

(2) Demonstration of root pressure

(3) Eosin test to demonstrate ascent of sap

(4) Demonstration of transpiration

 

Subtopic:  Phloem Translocation |
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Osmosis is a type of 

(1) imbibition of solution   

(2) diffusion of solvent

(3) evaporation of water   

(4) diffusion of solute

Subtopic:  Osmosis |
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Which of the following statement is correct?

(1) DPD = OP - WP

(2) DPD = OP + WP

(3) DPD = WP - OP

(4) DPD= TP + OP

Subtopic:  Plant Water Relations: Water Potential: DPD |
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Who had proposed theory of cohesion and adhesion forces?

(1) Dixon and Jolly (1894)

(2) Dixon and Benson (1885)

(3) Dixon and Jolly (1950)

(4) Sir Jagdish Chandra Bose (1850)

Subtopic:  Transpiration & Guttation |
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Stomatal opening is affected by 

(1) nitrogen concentration, carbon dioxide concentration and light

(2) carbon dioxide concentration, temperature and light

(3) nitrogen concentration, light and temperature 

(4) carbon dioxide concentration, nitrogen concentration and temperature 

Subtopic:  Stomata |
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Translocation of photosynthetic end products in seive tubes is

(1) 3-5 mm/h

(2) 3-5 cm/h

(3) 1-15 cm/h

(4) 60-100 cm/h

Subtopic:  Phloem Translocation: Short Distance Transport | Phloem Translocation |
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The ratio of osmotic pressure exerted by 1 M sucrose and 1 M NaCl solution will be

(1) 1                                 

(2) 2

(3) 0.1                             

(4) 0.5

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Glycolate induces opening of stomata in

(1) Presence of oxygen

(2) Low CO2 concentration

(3) High CO2 concentration

(4) Absence of CO2

Subtopic:  Stomata: 3 | Stomata |
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Cell A has osmotic potential of -18 bars and pressure potential of 8 bars, whereas, cell B has osmotic potential of -14 bars and pressure potential 2 bars. The direction of flow of water will be

(1) from cell B to cell A

(2) from cell A to cell B

(3) no flow of water

(4) in both the directions

Subtopic:  Water Potential Concept |
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