How Does a Cladogram Reveal Evolutionary Relatioships?

screenshotThis activity gives a short explanation of phylogeny and how cladograms are used to show evolutionary relationships.  Students analyze a diagram and identify derived characters.   Finally, students must construct their own cladogram that includes a slug, catfish, frog, tiger, and human.  A table helps them establish characteristics that are present or absent in each group.

Grade Level:  9-12 | Time Required:  45 min


HS-LS4-1  Communicate scientific information that common ancestry and biological evolution are supported by multiple lines of empirical evidence



  1. Sarah Mourer
  2. Mrs Moorman

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