At the end of both the Mesozoic and Paleozoic eras, there were mass extinctions (D).

The end of the Paleozoic era (about 252 million years ago) is marked by the largest mass extinction event in Earth's history, known as the Permian-Triassic Extinction Event, where it is estimated that 90% of marine species and 70% of terrestrial vertebrate species went extinct.

The end of the Mesozoic era (about 66 million years ago) is marked by another mass extinction event, known as the Cretaceous-Paleogene Extinction Event. This is famously associated with the extinction of the dinosaurs, among many other species. This event is often attributed to a large asteroid impact, but it's the mass extinction that marks the end of the era.

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At the end of both the Mesozoic and Paleozoic eras, there were mass extinctions (D).

The end of the Paleozoic era (about 252 million years ago) is marked by the largest mass extinction event in Earth's history, known as the Permian-Triassic Extinction Event, where it is estimated that 90% of marine species and 70% of terrestrial vertebrate species went extinct.

The end of the Mesozoic era (about 66 million years ago) is marked by another mass extinction event, known as the Cretaceous-Paleogene Extinction Event. This is famously associated with the extinction of the dinosaurs, among many other species. This event is often attributed to a large asteroid impact, but it's the mass extinction that marks the end of the era.

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At the end of both the Mesozoic and Paleozoic eras, there were mass extinctions (D).

The end of the Paleozoic era (about 252 million years ago) is marked by the largest mass extinction event in Earth's history, known as the Permian-Triassic Extinction Event, where it is estimated that 90% of marine species and 70% of terrestrial vertebrate species went extinct.

The end of the Mesozoic era (about 66 million years ago) is marked by another mass extinction event, known as the Cretaceous-Paleogene Extinction Event. This is famously associated with the extinction of the dinosaurs, among many other species. This event is often attributed to a large asteroid impact, but it's the mass extinction that marks the end of the era.

What happened at the end of both the Mesozoic and Paleozoic eras?A.There were major asteroid impacts.B.An ice age occurred.C.A supercontinent broke up.D.There were mass extinctions.

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