Biology 9700 · AS & A Level · Cells as the basic units of living organisms

Cells as the basic units of living organisms — practice question

The graph illustrates the reduction in cases of tuberculosis (TB) in a country from 1910 to 2000. Which factors may have helped bring about the fall during this period?

  • A1, 2 and 4
  • B1 and 3
  • C1 and 4 only
  • D2, 3 and 4

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