If we model the history of the universe as a single day, at what time would the first primitive forms of single-celled microorganisms appear?
A) 5:00 A.M.
B) 9:00 A.M.
C) 12:00 noon
D) 3:00 P.M.
E) 5:20 P.M.

Question

Quizplus · Accepted Answer

The first primitive forms of single-celled microorganisms appeared about 520 million years ago, which is about 5:20 P.M. in the model of the history of the universe as a single day.

If We Model the History of the Universe as a Single