Evidence of Evolution

Front

What is a vestigial structure?

Back

A vestigial structure is a body part that has lost its original function through evolution. An example is the tailbone in humans.

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What does evolution refer to?

Back

Evolution refers to the changes in species over time through processes such as natural selection and genetic drift.

Front

What does it imply if two organisms have similar DNA traits?

Back

If two organisms have similar traits of DNA, it suggests that they share a common ancestor.

Front

What evidence do the opossum and kangaroo provide regarding evolution?

Back

The opossum and kangaroo both incubate their young in a pouch, indicating that they are descended from a common ancestor.

Front

What is a homologous structure?

Back

A homologous structure is an anatomical feature in different species that is similar due to shared ancestry, such as the forelimbs of humans and whales.

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What is natural selection?

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Natural selection is the process by which organisms better adapted to their environment tend to survive and produce more offspring.

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What is the significance of fossil records in evolution?

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Fossil records provide evidence of past life forms and show how species have changed over time.

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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 speciation?

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Speciation is the process by which new species arise from existing species due to evolutionary processes.

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What role does genetic variation play in evolution?

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Genetic variation is essential for evolution as it provides the raw material for natural selection to act upon.