Question

Match the time period with the extinction event(s) Group of answer choices Cretaceous-Paleogene (K/Pg) boundary [ Choose ] Extinction of non-avian dinosaurs Extinction of avian dinosaurs Largest mass extinction (killed 96% of species living at the time) Smallest mass extinction (killed 4% of species living at the time) Account for 4% of all extinctions Background extinction (accounts for 4% of all extinctions) Background extinction (accounts for 96% of all extinctions) End of Permian [ Choose ] Extinction of non-avian dinosaurs Extinction of avian dinosaurs Largest mass extinction (killed 96% of species living at the time) Smallest mass extinction (killed 4% of species living at the time) Account for 4% of all extinctions Background extinction (accounts for 4% of all extinctions) Background extinction (accounts for 96% of all extinctions) Last 4 billion years [ Choose ] Extinction of non-avian dinosaurs Extinction of avian dinosaurs Largest mass extinction (killed 96% of species living at the time) Smallest mass extinction (killed 4% of species living at the time) Account for 4% of all extinctions Background extinction (accounts for 4% of all extinctions) Background extinction (accounts for 96% of all extinctions) All 5 mass extinctions (O, D, P, T, K/Pg)

          Match the time period with the extinction event(s)
Group of answer choices
Cretaceous-Paleogene (K/Pg) boundary
           [ Choose ]             Extinction of non-avian dinosaurs             Extinction of avian dinosaurs             Largest mass extinction (killed 96% of species living at the time)             Smallest mass extinction (killed 4% of species living at the time)             Account for 4% of all extinctions             Background extinction (accounts for 4% of all extinctions)             Background extinction (accounts for 96% of all extinctions)         
End of Permian
           [ Choose ]             Extinction of non-avian dinosaurs             Extinction of avian dinosaurs             Largest mass extinction (killed 96% of species living at the time)             Smallest mass extinction (killed 4% of species living at the time)             Account for 4% of all extinctions             Background extinction (accounts for 4% of all extinctions)             Background extinction (accounts for 96% of all extinctions)         
Last 4 billion years
           [ Choose ]             Extinction of non-avian dinosaurs             Extinction of avian dinosaurs             Largest mass extinction (killed 96% of species living at the time)             Smallest mass extinction (killed 4% of species living at the time)             Account for 4% of all extinctions             Background extinction (accounts for 4% of all extinctions)             Background extinction (accounts for 96% of all extinctions)         
All 5 mass extinctions (O, D, P, T, K/Pg)

Added by Penny A.

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