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प्रश्न
What could have triggered mass extinctions of species in the past?
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उत्तर
- Volcanic eruption
- Earthquake
- Extremes of temperatures
- Glaciations
- Continental drift
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संबंधित प्रश्न
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| A. Rare species | I. No species |
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| C. Endangered species | III. Localised species |
| D. Extinct species | IV. Species under threat |
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