Natural Selection

Between 1968 and 2002, the total number of peppered moths decreased by almost two thirds, although scientists do now know why. In the 10th video of the series, the instructor defines evolution as any changes to a gene pool. Scholars then explore the Hardy-Weinberg equilibrium and define natural selection as high fitness or low fitness. Finally, viewers see how good fitness can lead to adaptations and changes in the environment. 

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CCSS: Adaptable
NGSS: Adaptable
Additional Tags
Instructional Ideas
  • Video best fits in the beginning of a unit on evolution as it defines evolution and its relationship to natural selection
Classroom Considerations
  • Classroom should have a computer, access to the Internet, and a projection system
  • Provides closed captioning for learners who struggle with hearing or with the English language
  • Video assumes pupils understand mutations within DNA
  • Includes a concept map, slideshow, and two review worksheets
  • Provides a link to a related video on solving Hardy-Weinberg problems
  • Utilizes high-quality diagrams and photographs
  • None
Common Core