Environment & Ecology · Evolution & Mass Extinctions
During the Permian-Triassic mass extinction event approximately 252 million years ago, which of the following organisms became extinct?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Non-avian dinosaurs and Ammonites
- 2Ichthyosaurs and Plesiosaurs
- 3Trilobites and pelycosaurs like Dimetrodon✓
- 4Graptolites and Conodonts
Correct answer
Trilobites and pelycosaurs like Dimetrodon
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