Front

What is the fossil record?

Back

The fossil record is the collection of life's remains found in sedimentary rock, providing evidence of past life forms and their evolution.

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What does it mean if two species share homologous structures?

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It indicates that they are descended from a common ancestor, as these structures have similar forms but may serve different functions.

Front

How do fossils provide evidence for evolution?

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Fossils show how life forms present today are different from those in the past, indicating changes over time.

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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 are vestigial structures?

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Vestigial structures are body parts that have lost their original function through evolution, such as the human appendix.

Front

What is a common ancestor?

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A common ancestor is a species from which two or more different species have evolved.

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What is the significance of sedimentary rock layers in understanding evolution?

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Different sedimentary rock layers provide evidence for how the environment has changed over time and how life forms have adapted.

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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 does extinction mean in the context of evolution?

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Extinction refers to the end of an organism or a group of organisms, indicating that they no longer exist on Earth.

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What is the role of Charles Darwin in the study of evolution?

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Charles Darwin is known for proposing the theory of natural selection as a mechanism for evolution.