LS4.2 TEST for Common Ancestry

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What is common ancestry?

Back

Common ancestry refers to the idea that different species share a common ancestor from which they evolved.

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What are homologous structures?

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

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What is a cladogram?

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A cladogram is a diagram that shows the evolutionary relationships among a group of organisms based on shared characteristics.

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What evidence supports the theory of evolution?

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Evidence includes fossil records, comparative anatomy, genetic similarities, and embryonic development.

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What is the significance of amino acid sequences in determining relatedness?

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Amino acid sequences can reveal genetic similarities and differences, helping scientists determine how closely related different organisms are.

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What does it mean for organisms to share characteristics?

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Sharing characteristics means that organisms have traits or features in common, which can indicate a shared evolutionary history.

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How can skeletal structures provide evidence for evolution?

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Similar skeletal structures in different species suggest that they may have evolved from a common ancestor.

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What is the role of a common ancestor in evolution?

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A common ancestor is an ancestral species from which multiple species have evolved, explaining similarities among them.

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What is the difference between homologous and analogous structures?

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Homologous structures are similar due to shared ancestry, while analogous structures are similar due to convergent evolution, not common ancestry.

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What is the importance of shared characteristics in cladograms?

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Shared characteristics are used to group organisms in cladograms, helping to illustrate evolutionary relationships.