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

The microscope in cell studies — practice question

Several of the stages that lead to the development of a bacterial population resistant to a new antibiotic are shown below. 1 change in reproductive success of bacteria 2 increase in frequency of the resistance allele in the population 3 increase in genetic variation within the population 4 random mutation occurs in bacterial DNA What is the correct sequence of these processes?

  • A1  3  2  4
  • B2  1  3  4
  • C3  4  1  2
  • D4  3  1  2

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