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CAIE IGCSE Biology 8.1.3 Relate the Structure of Xylem Vessels Questions

Practise linking xylem vessel structure to function, from lignified thick walls and hollow lumens to continuous tubes that move water and support plants.

Syllabus
2026–2028
Course
Biology 0610

Exam points

  • link thick lignified xylem walls to support and resistance to collapse under tension
  • explain how hollow vessels with no cytoplasm reduce resistance to water flow
  • use no end walls, wide lumens or pits to explain continuous and lateral water movement

CAIE IGCSE Biology 8.1.3 Relate the Structure of Xylem Vessels Questions question 1

[Maximum number: 2]

Fig. 3.3 is a photomicrograph of a cross-section of part of a xerophyte leaf.

Fig. 3.3

Fig. 3.3

Describe two ways the structure labelled B in Fig. 3.3 is adapted for its function.

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