Evaporation from the leaf at first sets up a pressure gradient between the

1. Outside air and cytoplasm of cells of leaf

2. Outside air and air spaces of the leaf

3. Outside air and xylem cells of the leaf

4. Outside air and palisade cells of leaf

1. Absorption of minerals and water from the soil and transport in the plants

2. Supplies water for photosynthesis

3. Evaporative heating

4. Maintains the shape and structure of the plants by keeping cells turgid

1. 10 to 15 degrees

2. Up to 70 degrees

3. Up to 2 degrees

4. Up to 50 degrees

1. Guttation

2. Transpiration

3. Photosynthesis

4. Respiration

1. Half, double

2. Twice, half

3. One fourth, one third

4. Twice, one third

1. Minerals are charged particles

2. Minerals are insoluble in lipid bilayer

3. The amount of mineral is less in soil

4. All of these

1.  Some ions also move in epidermal cells passively

2.  The active uptake of ions is partly responsible for the water potential gradient in the roots.

3.  Uptake of water by the roots is through osmosis

4. Transport proteins of pericycle are control points where a plant adjusts the quantity and types of solute which will cross the cell membrane

1. An analysis of xylem exudate suggests that some of the nitrogen travels as inorganic ions and much of it is carried in the organic form as amino acids

2. Small amount of P and S is also carried as inorganic compounds in xylem exudate

3. There is exchange of material between xylem and phloem
4. Xylem transports inorganic nutrients while phloem transports organic materials, this observation was proved wrong by the analysis of xylem exudate

1. Depending on the season

2. Depending on the plant's needs

3. Depending on the phloem type

4.  Both A and B

1. Xylem is for water and mineral transport

2. Phloem is for translocation of food

3. Transport in phloem is multi directional as well

4. The portion below the ring becomes swollen due to water