Which is not correct with transporting the food through phloem?
1. Loading is a passive process
2. Translocation is due to hydrostatic force
3. Food translocation is bidirectional
4. Translocation always occur from source to sink
First sugar moves to
(At the time of loading of phloem)
(1) Companion cells
(2) Sieve tube cells
(3) Xylem vessels
(4) Phloem fiber
Girdling experiment suggests that
(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
The translocation of organic solutes in sieve tube members is supported by:
1. root pressure and transpiration pull
2. P-proteins
3. mass flow involving a carrier and ATP
4. cytoplasmic streaming
I. Phloem sap can be transported in any required direction.
II. Phloem transports mainly water and sucrose but other sugars, hormones, and amino acids are also transported.
III. Cytoplasmic strands pass through the holes in the sieve plate forming continuous filaments.
IV. Ascent of sap is a pulling movement and the translocation of organic solutes is a pushing movement.
1. All are correct
2. All are incorrect
3. I, II, III are correct
4. III and IV are correct