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Questions and Answers
Which event led to the accumulation of free oxygen in the atmosphere?
What caused the Ordovician-Silurian mass extinction?
What event resulted in the killing of 96% of marine and 70% of land species?
Which organisms were responsible for the accumulation of free oxygen in the atmosphere?
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When did the first vertebrates - fishes appear?
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Which event caused the accumulation of free oxygen in the atmosphere?
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What is the estimated time of the Ordovician-Silurian mass extinction?
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Which event resulted in the highest percentage of species extinction?
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When did the first vertebrates (fishes) appear?
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What caused the accumulation of oxygen in the atmosphere during the Great Oxygenation Event?
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Study Notes
Oxygenation of the Atmosphere
- The Great Oxygenation Event led to the accumulation of free oxygen in the atmosphere.
- This event was caused by the activities of oxygen-producing cyanobacteria.
Mass Extinctions
- The Ordovician-Silurian mass extinction was caused by an unknown event.
- This extinction event occurred around 443-485 million years ago.
- It resulted in the killing of 96% of marine and 70% of land species.
- The Permian-Triassic extinction event resulted in the highest percentage of species extinction, with 96% of marine and 70% of land species wiped out.
Evolution of Vertebrates
- The first vertebrates, fishes, appeared around 530 million years ago.
Notable Facts
- The Great Oxygenation Event, which occurred around 2.7 billion years ago, was responsible for the accumulation of free oxygen in the atmosphere.
- This event had a significant impact on the evolution of life on Earth.
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Description
Test your knowledge on the major events that shaped the existence of the Universe and the development of life on Earth. From the appearance of macromolecules to the Great Oxygenation Event, this quiz covers key milestones in the history of our planet. Challenge yourself and discover fascinating facts about the evolution of life as we know it.
