Archae, Bacteria and Eukaryota
The broadest group into which an organism can be classified is a domain. There are three domains: Bacteria, Archaea, and Eukarya. Organisms are grouped into these domains based on their cellular structure and genetic makeup.
evolving independently
bacteria, archaea, and eukarya
Domain bacteria and Domain archebacteria
bacteria domain archaea
Domain
Domain.
multicellular
The three-domain system recognizes fundamental differences between the Archaea, Bacteria, and Eukarya domains. These differences are based on genetic, biochemical, and structural characteristics that distinguish each domain from one another. This system has replaced earlier classification systems that grouped all organisms into either plants or animals.
Eukaryotes have a nucleus, Archaea do not.
Cells are grouped into tissues, tissues are grouped into organs, and organs are grouped into organ systems. These levels of organization work together to carry out the functions necessary for an organism to survive and thrive.
The broadest group for grouping organisms is called a domain. There are three domains: Bacteria, Archaea, and Eukarya. Organisms within the same domain share fundamental characteristics of cellular structure and biochemistry.