Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Pictorial representation of major events during the emergence of the three domains of life, namely, Archaea, Bacteria, and Eukarya. It is highly probable that both Archaea and Bacteria emerged from two resilient LUCAs based on their cell membrane compositions and biochemistries (see [50], with Eukarya being a chimera of the former two domains.) It is believed that viruses had an independent origin, probably emerging during the RNA world era.
