Unit 3 · Evolution and Diversity of Organisms
The biological species definition and three other species concepts, why scientific names are needed, the rules of binomial nomenclature, and how to use a dichotomous key.
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.