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Name ____________________________________________ Date _________________ Period ____________ Biodiversity and Evolution Step 6 Study Guide Level 3: Understands the role of reproductive isolation in the development of new species. Use the material provided on the finches on the Galapagos Islands to describe how a new species evolves over time. You will need at least two to three sentences for each description. Picture Description Founders Arrive Geographic Isolation Changes in gene pool Behavioral isolation (one of the reproductive isolation mechanisms) Competition and continued evolution Level 4 Research one of the following examples of evolution. 1. Pepper moths in industrial England 2. Kaibab squirrels on the north rim of the Grand Canyon and Abert squirrels on the south rim 3. Deer mice that migrated to the sand hills of Nebraska changed from dark brown to light brown to better hide from predators in the sand. 4. Insects become resistant to pesticides very quickly, sometime in one generation. If an insect is resistant to the chemical, most of the offspring will also be resistant. Considering that insect generations can be a matter of weeks, insects in an area can become immune to a chemical within months. 5. The bacterium Pseudomonas metabolizes nylon; but, when a certain type of this bacterium that did not eat nylon was placed in an environment where nylon was the only food, the bacterium evolved until it ate the nylon. Explain in an essay or in a well-labeled picture diagram the development of these species. Include the role of reproductive isolation and the specific mechanism(s).
