How old are the oldest fossils of more advanced organisms, the eukaryotes?
A)3.8 billion years
B)3.5 billion years
C)2.8 billion years
D)2.1 billion years

Question

Quizplus · Accepted Answer

The oldest fossils of more advanced organisms, the eukaryotes, are about 2.1 billion years old. This discovery indicates the presence of life forms with complex cellular structures much earlier in Earth's history than previously thought.

How Old Are the Oldest Fossils of More Advanced Organisms