Speciation and Extinction

Are we, as some scientists theorize, in the midst of the sixth mass extinction? Scholars explore speciation through adaptive radiation and extinction with a video that uses the three-spines stickleback in Alaska, and its current speciation due to poisoning of the lake as a model.

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CCSS: Adaptable
NGSS: Adaptable
Instructional Ideas

  • Have scholars research the five mass extinctions and present findings to the class
Classroom Considerations

  • Video assumes learners know something about phylogenetic trees
  • Video repeats some parts of #16 in this series (Speciation)
  • Video 17 in a series of 18
Pros

  • Video provides links to concept map, two review worksheets, and a slideshow that follows the video
  • Uses high-quality photographs and videos to supplement the topics discussed
Cons

  • None
Common Core

NGSS