Question

unit review - evolution of populations
which of these was one of the mass extinction events in which most land and water species were wiped out?
the big upwelling
the cambrian explosion
the permian extinction

Explanation:

The Permian - Triassic extinction event, also known as the Permian Extinction, was the most severe mass - extinction in Earth's history, wiping out most land and water species. The Big Upwelling is not a major mass - extinction event. The Cambrian Explosion was a period of rapid diversification of life forms, not an extinction event.

Answer:

C. the Permian Extinction