Molecular Evidence for Evolution
Focuses on DNA, RNA, and protein sequence comparisons, and molecular clocks as powerful tools to infer evolutionary relationships.
Key Questions
- Explain how similarities in DNA and protein sequences indicate evolutionary relationships.
- Analyze the concept of a molecular clock and its application in estimating divergence times.
- Justify why molecular evidence is considered a strong line of support for common ancestry.
Common Core State Standards
About This Topic
Urbanization and New Immigration covers the dramatic growth of American cities and the shift in immigration patterns during the late 19th century. This topic examines the 'New Immigrants' from Southern and Eastern Europe, the rise of nativism, and the challenging living conditions in urban tenements. Students also analyze the role of political machines like Tammany Hall in providing services to immigrants in exchange for political power.
For 11th graders, this topic is essential for understanding the origins of modern urban life and the persistent debates over immigration and assimilation. It highlights the work of muckrakers like Jacob Riis in exposing urban poverty. Students grasp these social dynamics faster through collaborative investigations into tenement life and role-playing the interactions between immigrants and political 'bosses.'
Active Learning Ideas
Inquiry Circle: Tenement Life
Small groups analyze photos from Jacob Riis's 'How the Other Half Lives' and floor plans of 'dumbbell' tenements. They must identify the health and safety hazards and propose reforms that would eventually be passed in the Progressive Era.
Role Play: The Political Machine
Students assume the roles of a neighborhood 'ward boss' and a newly arrived immigrant. They negotiate a 'deal' where the boss provides a job or coal for the winter in exchange for the immigrant's vote, discussing the ethics of this system.
Think-Pair-Share: Nativism and the Chinese Exclusion Act
Students read excerpts from anti-immigrant pamphlets of the 1880s. They work in pairs to identify the economic and racial fears that led to the first major law restricting immigration based on nationality.
Watch Out for These Misconceptions
Common MisconceptionAll immigrants were welcomed with open arms at the Statue of Liberty.
What to Teach Instead
While the statue was a symbol of hope, many immigrants faced intense discrimination, medical inspections at Ellis Island, and outright exclusion (like the Chinese). A 'station rotation' on immigrant experiences helps students see the reality of the 'golden door.'
Common MisconceptionPolitical machines were purely evil and corrupt.
What to Teach Instead
While they were certainly corrupt, they also provided vital social services that the government did not yet offer, such as help with housing and jobs. Peer-led discussion on the 'pros and cons' of the machine helps students understand why they were so popular.
Suggested Methodologies
Ready to teach this topic?
Generate a complete, classroom-ready active learning mission in seconds.
Frequently Asked Questions
Who were the 'New Immigrants'?
What was a 'political machine'?
How did muckrakers influence urban reform?
How can active learning help students understand urbanization?
Planning templates for Biology
More in Evolution and the History of Life
Early Earth and Origin of Life
Explores hypotheses about the conditions on early Earth and the scientific theories regarding the abiotic synthesis of organic molecules and the first cells.
2 methodologies
Fossil Record and Geologic Time
Examines how fossils provide evidence for evolution, methods of dating fossils, and the major events in Earth's geologic history.
2 methodologies
Comparative Anatomy and Embryology
Evaluates homologous, analogous, and vestigial structures, and similarities in embryonic development as evidence for common ancestry.
2 methodologies
Darwin, Wallace, and Natural Selection
Introduces the theory of evolution by natural selection, including observations that led to its formulation and its core principles.
2 methodologies
Mechanisms of Evolution: Genetic Drift and Gene Flow
Explores other mechanisms of evolution, including genetic drift (bottleneck and founder effects) and gene flow, and their impact on allele frequencies.
2 methodologies