Respuesta :

Answer: Ordovician-Silurian extinction - 444 million years ago.

Late Devonian extinction - 383-359 million years ago.

Permian-Triassic extinction - 252 million years ago.

Triassic-Jurassic extinction - 201 million years ago.

Cretaceous-Paleogene extinction - 66 million years ago.

Explanation:

fizzy78
The extinction of a large number of species within a relatively short period of geological time, thought to be due to factors such as a catastrophic global event or widespread environmental change that occurs too rapidly for most species to adapt. ... Compare background extinction.

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