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Signed in but can't access contentOxford Academic is home to a wide variety of products. The institutional subscription may not cover the content that you are trying to access. If you believe you should have access to that content, please contact your librarian. Institutional account managementFor librarians and administrators, your personal account also provides access to institutional account management. Here you will find options to view and activate subscriptions, manage institutional settings and access options, access usage statistics, and more. Understanding: • Evolution of homologous structures by adaptive radiation explains similarities in structure when there are differences in function
Application: • Comparison of the pentadactyl limb of mammals, birds, amphibians & reptiles with different modes of locomotion
The Pentadactyl Limb Why do the bones of different species have similar body structures?structures are similar because they come from a common ancestor, such as the bones in the forelimbs of mammals. Homologous structures are similarities throughout a group of closely related species.
Why do anatomical similarities such as similar bone structures among different organisms provide evidence for the theory of evolution?Species may share similar physical features because the feature was present in a common ancestor (homologous structures). Molecular biology. DNA and the genetic code reflect the shared ancestry of life. DNA comparisons can show how related species are.
How do bones provide evidence of evolution?Key Points. Fossils are the preserved remains or traces of animals, plants, and other organisms from the past. Fossils are important evidence for evolution because they show that life on earth was once different from life found on earth today.
What does similar bone structure suggest about two species?The similar bone arrangement of the human, bird, and whale forelimb is a structural homology. Structural homologies indicate a shared common ancestor.
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