What defines a geological time period known as an era?
A) Location of the continents
B) The distinct life forms that were present
C) Average global temperature
D) The eras represent equal divisions of time

Question

Quizplus · Accepted Answer

The distinct life forms that were present define a geological time period known as an era. Each era is characterized by a unique set of dominant species and distinct biological communities that existed during that time.

What Defines a Geological Time Period Known as an Era