Biology 9700 · AS & A Level · The microscope in cell studies

The microscope in cell studies — practice question

What sequence of steps is required to determine the actual width of a xylem vessel seen in transverse section with a $\times 10$ objective lens?

  • A1, 2, 3 and 4
  • B2, 3 and 4 only
  • C1 and 2 only
  • D3 and 4 only

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