Question

The earth's worst mass extinction was:

Late Devonian
Ordovician-Silurian
Permian-Triassic
End Triassic
Cretaceous-Tertiary

Answer 1

Permian-Triassic ..........................................................

Answer 2

The Permian–Triassic (P–Tr) extinction event, colloquially known as the Great Dying, the End ...... Jump up ^ St. Fleur, Nicholas (16 February 2017). "After Earth's Worst Mass Extinction, Life Rebounded Rapidly, Fossils Suggest". New York Times ...