| A | B |
|---|
 | embryology evidence of evolution |
 | fossil evidence of evolution |
 | geographic isolation leads to speciation |
 | homologous structures |
 | law of superposition |
 | vestigial structures |
| clade | a common ancestor and all its descendants |
| common ancestor | the organism from which all organisms in a group are directly descended |
| biochemical evidence (DNA) | the most specific evidence of close relation |
