The Past 542 Million Years is Collectively Known as the ________

Question

The past 542 million years is collectively known as the ________ eon.
A) Phanerozoic
B) Cenozoic
C) Archaean
D) Paleozoic
E) Cambrian

Accepted Answer

The Phanerozoic eon is the most recent eon, beginning approximately 542 million years ago and continuing to the present. It is characterized by the explosion of multicellular life, including the diversification of fish, plants, insects, and mammals. The other options (B, C, D, E) refer to specific periods or subdivisions within the Phanerozoic eon.