The Evolution of Biochemical Molecules Started on Earth ____

Question

The evolution of biochemical molecules started on Earth ____.  
A) after the appearance of prokaryotic cells
B) long before any cells emerged
C) after the appearance of eukaryotic cells
D) after the appearance of eukaryotic cells but before the appearance of multicellular organisms
E) after the appearance of multicellular organisms

Accepted Answer

The origin of life on Earth is believed to have occurred around 3.5-4 billion years ago, and the evolution of biochemical molecules likely started before the emergence of any cells. The first living organisms were likely simple prokaryotic cells that evolved from these molecules. The emergence of eukaryotic cells and multicellular organisms occurred much later in the history of life on Earth.