| share bone | 0.52 |
| share same basic muscles | 0.44 |
| live on land | 0.39 |
| leave ocean | 0.31 |
| colonize the land | 0.28 |
| colonize air | 0.28 |
| retain fertilized egg | 0.25 |
| striven to enlarge bino… | 0.25 |
| backbone | 0.55 |
| brain | 0.44 |
| muscle | 0.40 |
| tooth | 0.38 |
| advanced nervous system | 0.29 |
| eye | 0.28 |
| spinal cord | 0.25 |
| spine | 0.25 |
| symmetrical | 0.49 |
| conscious | 0.41 |
| diverse | 0.28 |
| marine | 0.28 |
| responsible for metabol… | 0.68 |
| responsible for synthes… | 0.68 |
| responsible for storage | 0.68 |
| used in research | 0.53 |