IB Biology HL B3.2.9 Stem Tissue Distribution Questions

Explore how labelled dicot-stem cross-sections reveal xylem and phloem positions, from the ring of vascular bundles to tissue identification and transport function in IB Biology HL B3.2.9.

Exam points

Identify xylem or phloem in a labelled dicot-stem micrograph and state its transport function.
Describe vascular bundles as a ring, with phloem outermost and xylem toward each bundle’s centre.

[Maximum number: 2]

The micrograph shows a section through the root of a dicotyledonous plant $(\times 400)$ .

Figure for Question IB Biology HL B3.2.9 Stem Tissue Distribution Questions question 1 — IB Biology HL

Describe the distribution of vascular tissues in the stem of dicotyledonous plants.

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IB Biology HL B3.2.9 Stem Tissue Distribution Questions question 1