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CAIE IGCSE Biology 6.2.3 Structures Listed in 6 2 2 Adapt Questions

Practise explaining how epidermis, palisade and spongy mesophyll, stomata, air spaces and vascular tissues support light capture, gas exchange and transport.

Syllabus
2026–2028
Course
Biology 0610

Exam points

  • link a transparent or thin upper epidermis and densely packed, chloroplast-rich palisade cells to efficient light capture for photosynthesis
  • link spongy-mesophyll air spaces and stomata to rapid diffusion of carbon dioxide and oxygen while regulating water loss
  • explain how xylem supplies water and mineral ions and phloem transports sucrose away from photosynthetic tissues

CAIE IGCSE Biology 6.2.3 Structures Listed in 6 2 2 Adapt Questions question 1

[Maximum number: 3]

Fig. 4.1 is a photomicrograph of a cross section of part of a leaf.

Fig. 4.1

Fig. 4.1

Describe how the tissue labelled B is adapted to maximise photosynthesis.

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