| 1. | Fish to Amphibia | 2. | Amphibia to Reptilia |
| 3. | Reptilia to Bird | 4. | Reptilia to Mammal |
| 1. | Silurian, Devonian, Permian, Carboniferous |
| 2. | Silurian, Devonian, Carboniferous, Permian |
| 3. | Permian, Devonian, Silurian, Carboniferous |
| 4. | Silurian, Carboniferous, Permian, Devonian |