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5.2 Natural selection and evolution

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Question 20
F

Fossils are found in layers of rock. New layers of rock form on top of older layers.

The Figure shows the fossils found in four layers of rock in a cliff.

Figure

image

a.

Give the letter of the oldest fossil.

[1]
b.

Describe how a fossil of a hard body part, such as a bone, can be formed.

[2]
c.

Scientists have not found fossils of every organism that has lived on Earth.

Give two reasons why.

[2]
d.

Fossil C is found in a younger layer of rock than fossil B.

Suggest what the fossils in the Figure show about the organisms that have lived on Earth.

[1]
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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