Evidence of evolution

Science

Definition

Multiple lines of scientific evidence support the theory of evolution, including fossil records, comparative anatomy (homologous and vestigial structures), embryology, molecular biology (DNA/protein comparisons), and biogeography. Together, these demonstrate that species change over time and share common ancestors.

Examples

  • Fossil sequences showing horse evolution from small multi-toed ancestors
  • Human arm, whale flipper, and bat wing sharing the same bone structure (homologous structures)
  • DNA comparisons showing humans and chimpanzees share about 98% of their genome

Related Terms

Evolution Natural selection Phylogenetic trees Speciation

Study This Concept

Practice evidence of evolution with free review games in these units:

Biology Unit 5: Evolution and Natural Selection