Biological Evolution and Continental Drift Review

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What is uniformitarianism?

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The principle that the same natural laws and processes that operate in the universe now have always operated in the universe in the past and apply everywhere in the universe.

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What are tectonic plates?

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Sections of the lithosphere that move on top of the fluid asthenosphere; composed of Earth’s crust and the hard top layer of the mantle.

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What was Pangaea?

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A supercontinent that existed around 200 million years ago, when all the continents were joined together.

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What are fossils?

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Preserved remains of once living plants and animals.

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Who proposed the idea of Continental Drift?

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Alfred Wegener.

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What is the asthenosphere?

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A semi-fluid layer of the Earth's mantle that lies beneath the lithosphere and allows tectonic plates to move.

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What is natural selection?

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The process by which organisms better adapted to their environment tend to survive and produce more offspring.

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What is genetic mutation?

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A change in the DNA sequence that can lead to variations in traits among organisms.

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What is the significance of fossils in understanding evolution?

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Fossils provide evidence of past life forms and their changes over time, helping to trace the evolutionary history of species.

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What is continental drift?

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The theory that continents have moved over geological time and were once joined together.