Life first began during the _____ period.

Question

Quizplus · Accepted Answer

The Archean period is the oldest geological period in which we have evidence of life, dating back to around 3.5 billion years ago. The Cambrian period, on the other hand, is known for the explosion of complex life forms, but this occurred much later, around 541 million years ago. The Jurassic and Tertiary periods are known for the dominance of dinosaurs and the evolution of mammals, respectively, but they were even later than the Cambrian. The Proterozoic period falls between the Archean and the Cambrian and is characterized by the proliferation of single-celled organisms, but it is not where life first began.

Life First Began During the _____ Period