Which one of the following is correctly matched?
1. Passive transport of nutrients-ATP
2. Apoplast- Plasmodesmata
3. Potassium- Readily mobilized
4. Bakanae of rice seedlings-F Skoog
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
To initiate cell plasmolysis, the salt concentration must be :
1. isotonic
2. hypertonic
3. hypotonic
4. atonic
Turgor pressure is also referred to as
1. solute potential
2. water potential
3. pressure potential
4. osmotic potential
The process responsible for the movement of water from roots to all other parts of plants is
1. Evaporation of Water from leaves
2. Capillary action
3. Active transport
4. Both 1 and 2
What is never zero in a cell-
1. Solute potential
2. Water potential
3. DPD
4. Diffusion pressure
Loss of solutes from a cell leads to
1. Increase in water potential
2. Decrease in solute potential
3. Increase in pressure potential
4. All of the above
About _______________ % of the water taken in by roots is lost by transpiration.
1. 100
2. 98
3. 90
4. 60
Which is an incorrect statement.
1. Translocation of minerals up the xylem is an active process
2. The target cells unload the minerals by an active process
3. The absorption of minerals by plants is mostly an active process
4. Minerals usually flow up the vessels along with the transpiration stream.
A structural attribute of guard cells that aid in its effective functioning is
1. Large cell size
2. Radial micellation in walls
3. Thick walls
4. All of the above