Scientists Believe That the First Prokaryotes on Earth Arose Over

Multiple Choice

Scientists believe that the first prokaryotes on Earth arose over ________ years ago, and the first eukaryotes arose about ________ years later.

A) 3.5 million; 1.7 million
B) 1.7 million; 3.5 million
C) 3.5 billion; 1.7 billion
D) 1.7 billion; 3.5 billion