Fill in the blanks to accurately describe the mechanism of sugar transport in plant stems.
_________ is actively transported into the phloem by a group of specialised cells. The increased solute concentration causes the water potential to __________ in phloem and so water enters by __________. This results in a high _______ gradient causing a mass flow of water and sugar towards the _________ of the plant where the sugars are _____________ .
Name the main sugar that is found in the phloem.
Figure 1 shows the cross section of a phloem in a plant.
Figure 1
Identify cell type B labelled in Figure 1.
Using Figure 1, state one way in which the intracellular space of the sieve cells is adapted to mass transport.
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