Evolution Timeline (No Animals)
4.6 BYA what occurs ?
Formation of Earth and the atmosphere
2.7 BYA- 2.5 BYA There’s a gradual increase of what in the atmosphere ?
Oxygen (O2)
550 MYA What occurred ?
Cambrian Explosion
4.0 BYA what is formed & What do we have evidence of ?
Ocean basins and evidence of oldest rocks
2.0 BYA- 2.5 BYA What formed ?
Banded Iron formations
475 MYA First of what ?
First land plants on Earth
3.8 BYA TO 3.5 BYA The first life form is formed. What is it called ?
Prokaryotes
2.6 BYA What life formed ?
Eukaryotes
420 MYA What plants ?
Vascular Seed Plants
3.5-3.0 BYA what vital process evolved ?
Photosynthesis
1.6 BYA What vital process formed & What evidence is there ?
Endosymbiosis of prokaryotic organisms and evidence of multicellularity
305 MYA What plants ?
Seed Plants
2.8 BYA What appeared in the atmosphere ?
Oxygen (O2)
1.5 BYA What is there evidence of ?
Good Eukaryotic fossils
200 MYA There’s evidence of what ?