IB Biology HL B3.2.10 Root Tissue Distribution Questions

Explore how dicot-root epidermis, cortex, endodermis and central vascular tissues are arranged, and how the Casparian strip controls entry to xylem in IB Biology HL B3.2.10.

Exam points

Identify dicot-root epidermis with root hairs, cortex, endodermis and central vascular tissue in cross-section diagrams or micrographs.
Locate the central xylem cross and phloem between its arms, and explain how the Casparian strip forces selective symplast entry into the xylem.

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Study B3.2.10—Root 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 B3.2.10 Root Tissue Distribution Questions question 1 — IB Biology HL

Label tissues X and Y .

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IB Biology HL B3.2.10 Root Tissue Distribution Questions question 1