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Relative dating of fossils worksheets

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Today, the Dunkers are genetically unique and differ in gene frequencies, at many loci, from all other populations including their original homeland. In parapatric speciation, there is no physical barrier separating two populations which occur side-by-side (thus para).Which of the following likely explains the genetic uniqueness of this population? Without a physical barrier to gene flow it is difficult to prevent gene flow and maintain reproductive isolation making parapatric speciation rare.We talked about relative dating of rocks and how scientists use stratigraphic succession to compare the ages of different rock layers.

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Free 5-day trial See how well you can answer multiple-choice questions on topics like how the principle of fossil succession applies to dating and how to interpret fossil layers.Once you finish answering the questions, you'll get your quiz score automatically.Download: Description: Unit questions from five consecutive New York regents exams.Watch this video to find out how we use index fossils to establish the relative ages of rocks.In previous lessons, we talked about the Geologic Time Scale and how scientists use it to piece together the history of the earth.Free 5-day trial Use this quiz and worksheet to assess your understanding of the techniques geologists use to establish relative dating and the relationships that occurred over geologic time periods.