Biology 0610 · IGCSE · Size of specimens

Size of specimens — practice question

A student produced a diagram of an alveolus. The alveolus had a diameter of 90 mm in the diagram. The diagram’s magnification was $\times 225$. What is the alveolus’s actual size?

  • A4.00 mm
  • B2.50 mm
  • C0.40 mm
  • D0.25 mm

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