The Cretaceous extinction event was uniformly disastrous to all marine and nonmarine organisms.

Question

Quizplus · Accepted Answer

While the Cretaceous extinction event was a major event in Earth's history, not all organisms were uniformly affected. Many marine organisms, especially those that relied on planktonic food webs or were close to the surface of the ocean, were severely impacted. However, some deep-sea organisms and some land-based organisms, such as mammals, managed to survive and eventually thrive after the extinction event.

The Cretaceous Extinction Event Was Uniformly Disastrous to All Marine