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IB Biology HL 2.3.6 Surface Area-to-Volume Ratio Question Bank

Practise IB Biology HL 2.3.6 through exact HL questions on cell geometry, waste removal, red-cell adaptation and surface-area-to-volume limits.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Analyse how cell diameter changes surface-area-to-volume ratio and limits exchange efficiency.
  • Use geometry and transport evidence to explain efficient waste removal in small or specialised cells.
  • Evaluate how red-cell shape and size support gas exchange through a high effective surface area.

B2.3.6—Surface area-to-volume ratios question 1

[Maximum number: 1]

State what change there has been in the cell surface area to volume ratio in red blood cell 1.

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