Biology 0610 · IGCSE · Size of specimens

Size of specimens — practice question

The cell in the diagram has been enlarged 3000 times. The diagram is 21 mm wide. What is the cell’s true diameter?

  • A21 mm
  • B$\frac{21\,\text{mm}}{3000}$
  • C$21\,\text{mm} \times 3000$
  • D$\frac{3000}{21\,\text{mm}}$

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