Vascular bundles contain xylem and phloem vessels that are essential in plant transport systems.
Fig.1.1 shows an outline drawing of one vascular bundle within a stem cross-section, as well as its position within the stem.
Fig. 1.1
Identify tissue types A and B in the diagram above. Explain your answer.
Name a substance transported in the phloem.
Phloem tissues transport substances in both directions within a plant.
For example:
during late spring or summer, substances are transported from the leaves to the roots, or to parts of the plant that are actively growing
during early spring, substances are transported upwards, from storage organs in the roots
Suggest why substances are moved in different directions at different times of year.
(i) Name one plant organ, other than the stem, where vascular bundles are found.
[1]
(ii) Describe the role of xylem vessels in the organ identified in part (i).
[1]
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