Function of companion cells is:

1.	Loading of sucrose into sieve elements
2.	Providing energy to sieve elements for active transport
3.	Providing water to phloem
4.	Loading of sucrose into sieve elements by passive transport

Guttation is the result of:
1. Root pressure
2. Diffusion
3. Transpiration
4. Osmosis

Osmotic potential and water potential of pure water are respectively:
1.  0 and 0
2.  0 and 1
3.  100 and 0
4.  100 and 100

What shall be the water potential of a root hair cell absorbing water from the soil?
1.  Zero
2.  Less than zero
3.  More than zero
4.  Infinite

Casparian bands are found in:

The movement of ions against the concentration gradient will be:

Opening and closing of stomata are due to the:

1. Hormonal change in guard cells

2. Change in Turgor pressure of guard cells

3. Gaseous exchange

4. Respiration

Loading of phloem is related to:
1.  Increase of sugar in phloem
2.  Elongation of phloem cell
3.  Separation of phloem parenchyma
4.  Strengthening of phloem fiber

When water moves through a semipermeable membrane then which of the following pressure develops:
1.  O.P.
2.  S.P.
3.  T.P.
4.  W.P.

Select the incorrect statement.