Were the First Cells Prokaryotic or Eukaryotic

The first cells were most likely very simple prokaryotic forms. Ra- diometric dating indicates that the earth is 4 to 5 billion years old and that prokaryotes may have arisen more than 3.5 billion years ago. Eukaryotes are thought to have first appeared about 1.5 billion years ago.

Was the first cell prokaryotic?

Based on fossil evidence, prokaryotes were the first inhabitants on Earth, appearing 3.5 to 3.8 billion years ago during the Precambrian Period. These organisms are abundant and ubiquitous; that is, they are present everywhere.

When did the first eukaryotic cells form?

The eukaryotes developed at least 2.7 billion years ago, following some 1 to 1.5 billion years of prokaryotic evolution.