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A-Level Biology OCR A

Organisms Fossil Complex Evolved Animals Explain Record Evidence

The fossil record provides evidence for evolution by showing simpler organisms in older rocks and more complex organisms in younger rocks, with species appearing in a logical evolutionary sequence.

Il registro fossile fornisce prove dell'evoluzione mostrando organismi più semplici in rocce più antiche e organismi più complessi in rocce più recenti, con specie che appaiono in una sequenza evolutiva logica.

Front Explain how the fossil record provides evidence for evolution.
Back Fossil record:
  • Fossils of simplest organisms in oldest rocks, complex organisms in more recent rocks - supports theory that simple organisms gradually evolved into complex ones
  • Sequence in which organisms found matches their evolutionary links to each other (plants appear before animals - animals require plants to survive)
  • Analysis of anatomy of fossils studied to show how closely related organisms have evolved from same ancestor
  • Allows relationships between extinct and living organisms to be investigated

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