Unit 3 · Evolution and Diversity of Organisms
The conditions on early Earth, the four steps of biochemical evolution, the protocell, the first photosynthesisers and eukaryotes, key dates in the diversification of life, and the geological eons and eras.
Deshapriya Senevirathne. B.Sc. (Hons) Biology Special, University of Peradeniya — graduated with a class pass. All the content and lessons in A/L Biology on Paadama are reviewed by Deshapriya Senevirathne, and the lessons are taught by him.