If Earth's history was compressed into a single calendar year,complex organisms (including those with shells)first appeared in
A)February.
B)June.
C)October.
D)December.

Question

Quizplus · Accepted Answer

Complex organisms, including those with shells, first appeared around 541 million years ago during the Cambrian Explosion, which would be in October if Earth's history were compressed into a single calendar year.

If Earth's History Was Compressed into a Single Calendar Year,complex