1C. Speciation

The content pieces that are dealt with in this Enduring Understanding surround the process of speciation. Students are asked to look at the geologic timeline where extinctions have occurred (although they do not need to know any dates and names). However, it is important for students to relate times of mass extinctions with changing rates of speciation and changes in ecological niches. Resources include ecologist Stebbins’ account of speciation involving California salamander populations (A Step In Speciation) and a case study involving domestic and wild dogs (Man’s Best Friend). Both of these activities will hopefully lead students to understand that there is not always a definite answer to science questions.

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