Examine the graph below.
At which labeled point in this graph are the first eukaryotes thought to have evolved?

Question

Examine the graph below. 
At which labeled point in this graph are the first eukaryotes thought to have evolved?

Quizplus · Accepted Answer

The graph shows a timeline of Earth's history, and the first eukaryotes are thought to have evolved around 2 billion years ago, which is around Point B on the graph. At Point A, only prokaryotes are present, and at Point C and D, multicellular organisms and animals have already evolved. Therefore, Point B is the most likely point of eukaryote evolution.

Examine the Graph Below