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Evolution is supported by an overwhelming body of evidence from multiple independent fields of biology. At A-Level, you need to understand and evaluate the different lines of evidence in detail, including the fossil record, comparative anatomy, molecular biology, biogeography, and direct observation.
The fossil record provides direct physical evidence of organisms that lived in the past. It demonstrates:
Transitional fossils (or "intermediate forms") show features of two different groups, providing evidence that one group evolved from another.
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