The molar concentration of a sugar solution in an open beaker has been determined to be 0.3M. The solution is kept at 27 degree Celsius. The solute potential will be about:
1. - 3.75
2. - 7.48
3. - 9.18
4. 0

Water potential (Ψ) in plants is affected by:
I. mechanical pressure.
II. matrix effects (e.g., fluid cohesion and surface tension).
III. dissolved solutes.
IV. osmosis.
1. I, II and III only
2. I, III and IV only
3. II, III and IV only
4. I, II, III and IV