| 1. | Devonian period | - | Age of fishes |
| 2. | Carboniferous period | - | Age of amphibians |
| 3. | Ordovician period | - | Age of invertebrates |
| 4. | Cretaceous period | - | Age of reptiles |
| 1. | Jurassic, Triassic, Cretaceous |
| 2. | Triassic, Jurassic, Cretaceous |
| 3. | Permian, Jurassic, Triassic |
| 4. | Devonian, Permian, Jurassic |
| 1. | Gymnosperms are dominant plants and first birds appear |
| 2. | Dianosaurs become extinct and gymnosperms appear |
| 3. | Flowering plants disappear |
| 4. | Radiation of reptiles and origin of mammal-like reptiles |