How Can We Explain Evolutionary Relationships among Species?

• In this lesson, students learn how environmental factors drive the adaptations of Galápagos finch populations, make observations, analyze genetic and phylogenetic data, and make predictions about the evolution of finch populations.
• This resource contains background information, key concepts, student learning targets, a list of materials, teaching tips, extension activities, and an answer key.
  

Positives

• Students will use their problem-solving and critical thinking skills in this lesson.
  
• There are graphs of bird songs that students can evaluate, along with images and video clips.
  

Additional Prerequisites

• This activity is expected to take two 50-minute periods to complete and possibly more if the extension is included.
• Students should understand DNA sequences and how they affect natural selection before completing the activity.
  
• The portions of the activity that relate to the video clips require access to the Internet.
• There are two additional videos about natural selection related to finches and lizards that students can explore.
  

Differentiation

• Students can complete the activity individually, in pairs, or in groups.
• This lesson also includes an extension activity where students can apply what they have learned. The extension activity consists of six comprehension questions and three short video clips.
• Have students consider what effects climate change can have on natural selection, genetic diversity, and events that may speed up natural selection or create genetic bottlenecks.
• Have students consider the implications of research on natural selection for species conservation and climate policies.
• This lesson connects to AP/IB Biology and AP/IB Environmental Science classes, as well as general science and common core classes.