Evidence of Evolution

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What is an analogous structure?

Back

Structures that perform a similar function but are not similar in origin.

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What is a homologous structure?

Back

Features found in different organisms that share structural similarities but may have very different functions.

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What are vestigial structures?

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Remnants of once-important structures that have slowly lost all or most of their function.

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What is the significance of fossils in understanding evolution?

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Fossils show how life forms present today are different than those from the past.

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What does it mean if a structure is described as vestigial?

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It means that the structure was once functional in an ancestor but has lost its primary function over time.

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What is the difference between homologous and analogous structures?

Back

Homologous structures share a common ancestry but may serve different functions, while analogous structures serve similar functions but do not share a common ancestry.

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How do sedimentary rock layers provide evidence for evolution?

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Different sedimentary rock layers show how the environment has changed over time, indicating the evolution of life forms.

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What is the role of comparative anatomy in studying evolution?

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Comparative anatomy examines similarities and differences in the anatomy of different species to understand evolutionary relationships.

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What is a fossil?

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A preserved remain or impression of a once-living organism.

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How can the age of fossils be determined?

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The age of fossils can be determined through relative dating and radiometric dating techniques.