Khan Academy: Speciation

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...

How are living organisms grouped? In this eight-minute video clip, the system of grouping them according to similarities and relationships is broken down in a simple and straightforward manner. Sal explains the definition of species and...

Test your knowledge on biodiversity patterns of speciation and extinction.

A list of references to articles about biodiversity patterns of speciation and extinction.

Find out what defines a species, and learn how new species can arise from existing species.

Learn how genetic variation is the raw material of evolution, and learn how restricted gene flow can lead to the formation of new species. [11:52]

What a species is and isn't. Ligers, tiglons, mule, hinnies, and dogs. [8:48]

How variation can be introduced into a species. [19:51]