LS4-1 Evidence of Evolution

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What are homologous structures?

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Homologous structures are anatomical features in different species that share a common ancestry, indicating evolutionary relationships.

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How does the Archaeopteryx fossil support the Theory of Evolution?

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The Archaeopteryx fossil, with feathers, suggests that birds and dinosaurs have a common ancestor.

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What does the evolution of horses indicate about toe development?

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The evolution of horses indicates a change from four toes to one toe.

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How does embryology provide evidence for evolution?

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Embryology shows similarities in early development stages among different species, suggesting a common ancestry.

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What do fossils reveal about the history of life on Earth?

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Fossils provide evidence of past organisms, their structures, behaviors, and environments, helping scientists understand evolution and extinction events.

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What is the significance of vestigial structures in evolution?

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Vestigial structures are remnants of organs or structures that had a function in early ancestors but are reduced or nonfunctional in later species, indicating evolutionary change.

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What is the concept of natural selection?

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Natural selection is the process where organisms better adapted to their environment tend to survive and produce more offspring, leading to evolutionary change.

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What is the difference between analogous and homologous structures?

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Analogous structures are similar in function but do not share a common ancestry, while homologous structures share a common ancestry but may have different functions.

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What role do mutations play in evolution?

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Mutations are changes in DNA that can lead to new traits; if beneficial, they may be passed on to future generations, driving evolution.

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What is the fossil record?

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The fossil record is the collection of all known fossils and their placement in the geological time scale, providing evidence of the history of life on Earth.