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4.1 Evolution and natural selection

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Question 28
H

A mutation produces resistance in one bacterium before an antibiotic is used. The antibiotic is then added. Which statement correctly links mutation and selection?

[1]
A

Mutation produces variation; antibiotic exposure changes relative survival.

B

Mutation produces variation; antibiotic exposure changes every surviving allele.

C

Mutation selects survivors; antibiotic exposure produces purposeful variation.

D

Mutation selects survivors; antibiotic exposure removes all inherited variation.

Markscheme

4.1 Evolution and natural selection Questions

  1. GCSE
  2. /Biology
  3. /4.1 Evolution and natural selection

44 exam-style questions on Edexcel GCSE Biology 4.1 Evolution and natural selection, covering 4.1.1 Work of Darwin and Wallace and 4.1.2 Resistant organisms and evolution. Each one has a worked solution and a mark scheme showing where the marks go.

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