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 how they must be able to produce fertile offspring. He mentions that offspring of two different species result in hybrids. Finally, he expounds on how humans have gotten different breeds of dogs to interbreed, but that they result in fertile offspring, meaning that they are all of the same species. This lesson makes a nice support to your taxonomy lesson.

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  • Colorful photographs and written text keep viewer's attention

  • When written text is not appearing, it is a little difficult to see where the instructor is pointing; it is important to pay attention to the audio