increase biodiversity. Part B: Learn about the basics of evolution at 3 . What is evolution and what is it responsible for? 4 . [Click ‘next’] When does evolution take place? 5 . Only inherited ______________________ differences that can be passed on are acted upon by evolution. 6 . Compare the two examples of changes in beetle populations. Which of the two scenarios is an example of evolution? Defend your answer with an explanation. 7 . [Click ‘next’] Identify and describe the four basic mechanisms for evolutionary change in your own words! Mechanism Description 8 . Genetic drift and natural selection only take place if there is ___________________ __________________.
9 . [Click next several times to read about mutations] Now complete the paragraph below regarding gene flow. “Gene flow, also called _________________, is any movement of ______________ from one __________________ to another. Gene flow includes lots of different kinds of events, such as _________________ being blown to a new destination or people moving to new cities or countries. If ______________ are carried to a population where those genes previously did not __________________, ____________________ can be a very important source of genetic ___________________. In the graphic on the website, the gene for _________________ coloration moves from one population to another.” 10 . [Click next and read until you get to Genetic Drift] Summarize the idea behind genetic drift. 11 . [Click next] Natural selection is the most important mechanism behind evolution. This webpage gives you an example of natural selection involving beetles. Read the descriptions and look at the cartoons. Explain what has happened to this population of beetles, using the following terms: Adaptation, Survive, Reproduce, Gene, Natural Selection, Species, and Evolution. 12. How do the finches of the Galapagos Islands demonstrate evolution? 13 . [Click next] Fitness does not necessarily mean “strongest.” Defend this statement.