Unit 3 · Evolution and Diversity of Organisms
The diagnostic features, classes and examples (with local and medical importance) of Platyhelminthes, Nematoda, Annelida and Mollusca.
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.