Comparative Anatomy and Fossil Records

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What is a vestigial structure?

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A vestigial structure is a body part that has lost its original function through evolution. An example is the human appendix.

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What is a homologous structure?

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Homologous structures are body parts in different species that have a similar origin but may serve different functions, indicating a common ancestor.

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What is an analogous structure?

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Analogous structures are body parts in different species that serve similar functions but do not share a common evolutionary origin.

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What is the process of fossil formation?

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Fossil formation occurs when an organism is buried by sediment and the organic materials are replaced by minerals over time.

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What are the main methods of dating fossils?

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Fossils are dated using relative dating, absolute dating, and carbon-14 dating.

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What is comparative anatomy?

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Comparative anatomy is the study of the similarities and differences in the structures of different organisms.

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What is evolution?

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Evolution is defined as the change in a species population over time.

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What is radiometric dating?

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Radiometric dating is a method used to date materials by comparing the abundance of a radioactive isotope to its decay products.

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What is stratigraphy?

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Stratigraphy is the study of rock layers (strata) and layering (stratification), used in dating and understanding the sequence of geological events.

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What is biostratigraphy?

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Biostratigraphy is a branch of stratigraphy that uses fossil organisms to date and correlate rock layers.