- Human Evolution Research
- Climate and Human Evolution
- Anthropocene: The Age of Humans
- Asian Research Projects
- East African Research Projects
- Human Origins Program Team
- What's Hot In Human Origins?
- Fossil Forensics: Interactive
- E. A. Mammal Dentition Database
- Human Evolution Evidence
- 3D Collection
- Human Fossils
- Human Family Tree
- Timeline Interactive
- Human Characteristics
- About Us
Investigating Common Descent: Formulating Explanations and Models (Grades 9-12)
Author/Source: National Academy of Sciences (via Understanding Evolution)
- Present-day species evolved from earlier species; the relatedness of organisms is the result of common ancestry.
- Similarities among existing organisms provide evidence for evolution.
- Anatomical similarities of living things reflect common ancestry.
- All life forms use the same basic DNA building blocks.
- Scientists pose, test, and revise multiple hypotheses to explain what they observe.
- Our understanding of life through time is based upon multiple lines of evidence.
- Scientists use the similarity of DNA nucleotide sequences to infer the relatedness of taxa.
- Scientists use anatomical evidence to infer the relatedness of taxa.
Grade Level: 9-12
Time: Two class periods
Teacher Background: Explore these links for additional information on the topics covered in this lesson: