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Marooned in the Galapagos
Scenario: Seeing evolution in action is often difficult, but one way to monitor evolutionary change over a short period of time is to watch what happens to species/populations in a difficult or stressful environment. The Galapagos Islands, one of the most famous laboratories of evolution and adaptation, will be explored through this scenario. Despite the islands' bleak appearance, the unusual fauna and flora of the Galapagos Islands have captivated generations of biologists since Darwin. As we tour the Galapagos Islands and their species, we will touch upon different aspects of adaptation.
1. Entire scenario
In-Class Discussion and Thought Questions (also possible homework questions):
Major Terms Introduced:
Related Laboratory Experiments :
Lab 6: How does nut diversity and abundance influence survival of birds with
different beak types?
Corresponding Essential Study Partner Segments:
The Essential Study Partner is part of the McGraw-Hill Web Site.
To access it go here. Then follow these relevant paths below:
Evolution > Processes > Natural Selection Evolution > Processes > Variation Evolution > Processes > Adaptation Evolution > Speciation > Introduction Ecology > Populations > Ecology > Populations > Growth Ecology > Populations > Size Regulation Ecology > Communities > IntroductionEcology > Communities > Organization
Many of these are figures and accompanying text, but some are video clips that should help you see the process in action.
Selection in the Galapagos
- a tutorial revieiw the concepts of natural selection, coevolution, adaptive radiation, and others using examples from the Galapagos islands that we discussed in class
- a tutorial illustration the different ways that speciation events can occur
Speciation and Adaptive Radiation on Islands from the PBS "Evolution" Series
- This is a great interactive tutorial explaining how many species can arise from one in a geologically short period of time. Based on known speciation events.
Mystery of the Time Traveling Iguanas
- See if you can solve this puzzle - The present day Galpagos islands are 2-3 million years old, but data from molecular clocks are consistent with the divergence of land and marine iguanas occuring 12 million years ago. This web-based inquiry exercise by Arlene Weiner and Dan Suthers of University of Hawai`i at Manoa will help you.
Useful WWW sites:
The site for your textbook Life by Ricki Lewis
Talk.Origins Archives - Exploring the Creation/Evolution Controversy
Questions and answers about evolution and creationism.
of Evolution and Evolutionary Thought, Museum of Paleontology, University
of California, Berkeley
The virtual museum has exhibits about evolution, as well as geology, and paleontology.
geology on the web from Cornell University
|Biological El Nino Effects|
|Evolution and Behavior|
|Evolution Web Sites|
|Adaptive Radiation and Anoles|
Textbook Flashcards :
The website for your textbook has flashcards organised by chapters. You are only responsible for topics discussed in class. For this scenario, flashcards with the Major Terms Introduced can be found in:
Chapter14: The Evolution of Evolutionary Thought
Chapter 15: The Forces of Evolutionary Change-Microevolution
Chapter 16: Speciation and Extinction
Chapter 42: Populations