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5.2 Natural selection and evolution

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Question 9
F

Two populations of squirrels live on opposite sides of a deep canyon. The squirrels cannot cross the canyon.

  • On the north side of the canyon, the climate is colder and there is more snow.
  • On the south side of the canyon, the climate is warmer and drier.

Today, the squirrels on the two sides of the canyon look different.

a.

State what is meant by evolution.

[2]
b.

Explain how the two populations of squirrels could have become different.

[3]
c.

Scientists think that the two populations may now be different species.

Describe how scientists could test this.

[2]
Markscheme

5.2 Natural selection and evolution Questions

  1. GCSE
  2. /Biology
  3. /5.2 Natural selection and evolution

122 exam-style questions on OCR GCSE Biology 5.2 Natural selection and evolution, covering 5.2.1 Genetic variation within a population, 5.2.2 Developments in classification systems, 5.2.3 How evolution occurs through natural selection, 5.2.4 Evolution as change over time, 5.2.5 Evidence for evolution, and 5.2.6 Darwin and Wallace. Each one has a worked solution and a mark scheme showing where the marks go.

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