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Biological smoke alarms - PowerPoint PPT Presentation

Chapter 7

Chapter 7. Community Ecology. Chapter Overview Questions. What determines the number of species in a community? How can we classify species according to their roles in a community? How do species interact with one another? How do communities respond to changes in environmental conditions?

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Biodiversity and Evolution

Biodiversity and Evolution. Chapter 4. Core Case Study: Why Should We Care about the American Alligator?. Largest reptile in North America 1930s: Hunters and poachers Importance of gator holes and nesting mounds 1967: endangered species 1977: comeback, threatened species.

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Biodiversity and Evolution

Biodiversity and Evolution. Chapter 4. Three Big Ideas. Populations evolve when genes mutate and give some individuals genetic traits that enhance their abilities to survive and to produce offspring with these traits (natural selection).

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535 views • 39 slides

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Biological smoke alarms - PowerPoint PPT Presentation

Chapter 7

Biodiversity and Evolution

Biodiversity and Evolution