B. Based on GTS, identify the period when each of the important events happened. Write your answer in the space provided on the right side.

1. Single-celled organisms: 3,500 million years ago
2. Trilobites: 500 million years ago
3. Early land plants: 430 million years ago 4. Reptiles: 280 m.y.a.
5. Fish: 395 m.y.a.
6. Dinosaurs: 225-65 m.y.a.
7. Mammals: 65 m.y.a.
8. Humans: 2.5 m.y.a.
9. Birds: 120 m.y.a.
10. Pangaea starts to separate: 225 m.y.a.

pa help po, Brainliest ko maka sagot ng tama.​