IB Biology HL B3.2.9 Stem Tissue Distribution Questions

Explore how dicot-stem epidermis, cortex, pith and ring-arranged vascular bundles are located in plan diagrams and micrographs in IB Biology HL B3.2.9.

Exam points

Identify epidermis, cortex, pith and vascular bundles in dicot-stem plan diagrams or micrographs, including xylem and phloem within each bundle.
Describe dicot-stem vascular bundles as a ring, with phloem toward the outside and xylem toward the centre, and relate these positions to transport tissues.

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Study B3.2.9—Stem tissue distribution conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

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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