The boundaries of the Phanerozoic are marked by the __________ of particular groups of organisms followed by ________ of new groups of organisms.
A)radiation; extinction
B)fossilization; radiation
C)extinction; fossilization
D)extinction; radiation

Question

Quizplus · Accepted Answer

The Phanerozoic eon is characterized by the extinction of certain groups of organisms, which is often followed by the radiation, or rapid diversification, of new groups of organisms. This pattern reflects significant evolutionary changes and mass extinction events that have shaped the history of life on Earth.

The Boundaries of the Phanerozoic Are Marked by the __________