Scientists investigate two deposits containing remains of the same extinct mammal species.
At site F, the remains froze soon after death and remained frozen. At site G, the remains were buried slowly in sediment in which oxygen, moisture and warmth were present.
| Evidence preserved | Site F | Site G |
|---|---|---|
| Number of specimens with bones or teeth | 92 | 89 |
| Number of specimens with skin or hair | 21 | 2 |
A specimen may be included in both rows.
A scientist concludes, ‘The fossil record of this mammal is equally complete at the two sites.’
Evaluate the scientist’s conclusion. Use the information in the table and your knowledge of fossil formation.
71 exam-style questions on AQA GCSE Biology 6.3 The development of understanding of genetics and evolution, covering 6.3.1 Theory of evolution, 6.3.2 Speciation, 6.3.3 The understanding of genetics, 6.3.4 Evidence for evolution, 6.3.5 Fossils, 6.3.6 Extinction, and 6.3.7 Resistant bacteria. Each one has a worked solution and a mark scheme showing where the marks go.