This 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