Khan Academy
Species
How are living organisms grouped? In this eight-minute video clip, the system of grouping them according to similarities and relationships is broken down straightforwardly. Sal explains the definition of species and how they must be able...
Curated OER
Taxonomy and the Tree of Life
Mr. Khan explains with pictures and diagrams Carl Linneaus' taxonomy system and the biological tree of life. He mentions that the debate still continues regarding how to classify organisms and that newer technology that examines DNA is...