Which one of the following elements in plants not re-mobilized?

1.	Calcium	2.	Potassium
3.	Sulphur	4.	Phosphorus

The rupture and fractionation do not usually occur in water column in vessel/tracheid’s during the ascent of sap because of:

1. Lignified thick walls

2. Cohesion and adhesion

3. Weak gravitational pull

4. Transpiration pull

Xylem translocates:

1. Water, minerals salts, some nitrogen and hormones

2. Water only

3. Water and mineral salts only

4. Water, mineral and some organic nitrogen only

What is the direction of movement of sugars in phloem?

1. Bi-directional

2. Non-multidirectional

3. Upward

4. Downward

If a cell A with DPD, 4 bars is connected to cells B, C, D whose OP and TP are respectively 4 and and 4, 10 and 5 and 7 and 3 bar, the flow of water will be:

1. C to A, B and D

2. A and D to B and C

3. A to B, C and D

4. B to A, C and D

Plant cells submerges in distilled water will become:

1. Turgid

2. Flaccid

3. Plasmolysed

4. Impermeable.

Osmosis is defined as the process in which : 

1. Water diffuses from low solute concentration to high solute concentration

2. Solutes diffuse from lower concentration to higher concentration

3. Active transport of ions take place

4. Passive transport of ions take place.

Water potential in the leaf tissue is positive (+ve) during:

1. Excessive transpiration

2. Low absorption

3. Low transpiration

4. High Transpiration

If cohesion-tension transpiration theory is correct then a break in water column in xylem vessels :

1. should cause the mesophyll cells to become flaccid and result in wilting of leaves.

2. should increase the water contents of leaves

3. shouls have no effect at all

4. should increase the rate of photosynthesis.

Which one is not related to transpiration?

1. Bleeding

2. Circulation of water

3. Absorption and distribution of mineral salts

4. Regulation of plant body temperature.