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RESOURCE	GRADE LEVEL	MEDIA TYPE
Allopatric Speciation These images from the Smithsonian Institution depict Nancy Knowlton's work with snapping shrimp in Panama. Knowlton found that the closing of the isthmus -- dividing the Pacific Ocean from the Caribbean -- resulted in new species of shrimp.	9-12	Image
Shape of Trees: The Frustration Principle This series of images shows the work of biologist Karl Niklas on the adaptations and evolution of plants. From The Evolutionary Biology of Plants.	9-12	Image

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Evolution and Diversity

Processes of Evolution

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Browse results: Processes of Evolution

Allopatric Speciation

Shape of Trees: The Frustration Principle