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

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

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

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 

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)

Which of the following statement is correct?

(1) DPD = OP - WP

(2) DPD = OP + WP

(3) DPD = WP - OP

(4) DPD= TP + OP

Osmosis is a type of 

(1) imbibition of solution   

(2) diffusion of solvent

(3) evaporation of water   

(4) diffusion of solute

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

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

The modified equation for water potential is:

1. ${\mathrm{\Psi }}_{\mathrm{w}}=$ ${\mathrm{\Psi }}_{\mathrm{s}}$ $+$ ${\mathrm{\Psi }}_{\mathrm{p}}$

2. ${\mathrm{\Psi }}_{\mathrm{w}}$ $=$ ${\mathrm{\Psi }}_{\mathrm{s}}-{\mathrm{\Psi }}_{\mathrm{p}}$

3. ${\mathrm{\Psi }}_{\mathrm{w}}={\mathrm{\Psi }}_{\mathrm{s}}$

4. ${\mathrm{\Psi }}_{\mathrm{w}}={\mathrm{\Psi }}_{\mathrm{p}}-{\mathrm{\Psi }}_{\mathrm{s}}$