Variation between Species: The Curious Question of the Cristóbal Iguanas

This activity investigates the marine iguanas of San Cristóbal and how and why there are 2 distinct populations from one common ancestor.

Learning objectives

  • Science: Understand the process of heredity.
  • Explain how variation between species can drive natural selection. 
  • Understand how environmental changes can lead to changes in species.

Students' outcomes

  • To understand and explain how the San Cristóbal iguanas became physically and genetically two separate species.


The Curious Question of the Cristóbal Iguanas

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