2.  Hypertonic

3.  Hypotonic

4.  Non- ionic

2.  Neither pure water nor soil solution

3.  Soil solution but higher than of pure water

4.  Pure water but higher than that of soil solution

1.  O.P = D.P.D

2.  OP = Zero

4.  D.P.D = O.P

1.  Isotonic

3.  Hypertonic

4.  None of the above

2.  Diffusion pressure demand

3.  Daily photosynthetic depression

4.  Daily phosphorus demand

1.  Diffusion

3.  Osmotic pressure

4.  Wall pressure

2.  Independently of water

3.  Only when soil solution is hypertonic to cell sap

4.  Only when soil solutions is hypotonic to cell sap

1.  Movement of molecules from area of higher concentration into area of lower concentration

2.  Uptake of water by plant roots

4.  Passage of solute from a week solution to a strong solution when the two are separated by a semi - permeable membrane

1.  Stomatal initiation

2.  Stomatal closure

4.  Stomatal growth

1.  Osmosis

2.  Diffusion

4.  Imbibitions