Assignment 6 - Yang You Assignment 6 1 Bacteria were the only organisms on earth for a long time When was that 3.5 billions years ago 2 What is meant

Assignment 6 - Yang You Assignment 6 1 Bacteria were the...

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Yang You Assignment 6 1. Bacteria were the only organisms on earth for a long time. When was that? 2. What is meant with the great oxidation in the Paleoproterozoic Era? What was the cause of it? 3. What is meant with the Cambrian explosion of life?
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Unformatted text preview: 4. When did the first land plants appear? 375 million years ago 5. When did the first amphibians appear? 360 million years ago 6. When was the largest mass extinction? Permian extinction- 250 million years ago 7. When did the first birds appear? 150 million years ago, however, the evolutionary history of birds is still somewhat unclear. 8. What is Pangea? When did it start to fall apart? It is the great supercontinent; 190 million years ago 9. The first grazing animals appeared with the first grasslands. When was that? 25 million years ago 10. When did the first hominids appear? 1.5 million years ago...
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  • Fall '16
  • Evolution, largest mass extinction, 1.5 million years, 25 million years, 150 million years, 190 million years

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