What was the first domain to appear?
Answer: The first domain name registered was Symbolics.com. It was registered March 15, 1985, to Symbolics Inc., a computer systems company in Cambridge, Mass. It was not the first domain name created, however — that title goes to Nordu.net, a Scandinavian research collaboration, which created the domain Jan. 1, 1985.
Can archaea cause disease in humans?
No definitive virulence genes or factors have been described in archaea to date. Nevertheless, archaea may have the means, and they certainly have the opportunity, to cause disease. Archaea share some characteristics with known pathogens that may reflect the potential to cause disease.
What is Archaea vs bacteria?
A possible answer is: Bacteria contain peptidoglycan in the cell wall; archaea do not. The cell membrane in bacteria is a lipid bilayer; in archaea, it can be a lipid bilayer or a monolayer. Bacteria contain fatty acids on the cell membrane, whereas archaea contain phytanyl.
Is yogurt bacteria or eukarya?
However, some foods—such as yogurt—are supposed to have bacteria in them! The bacteria in these foods are not dangerous. In yogurt, masses of rod- shaped bacteria feed on the sugar (lactose) in milk. The bacteria convert the sugar into lactic acid.
Is yogurt a prokaryote?
Prokaryotes include cells you’ve probably heard of, such as the bacteria E. coli and Streptococcus (which causes strep throat), the blue-green algae that occasionally cause lake closures, and the live cultures of bacteria in yogurt, as well as some cells you may never have heard of, called archaeans.
How long have bacteria existed?
about 3.5 billion years
Which came first bacteria archaea or eukarya?
The fossil record indicates that the first living organisms were prokaryotes (Bacteria and Archaea), and eukaryotes arose a billion years later.
Did bacteria or archaea come first?
As the evolutionary story is usually told, first came the prokaryotes: the archaea and bacteria, which are often envisioned as simple bags of enzymes without an intricate structure.
What is the order of a human?
Primate
What is a kingdom in science?
noun, plural: kingdoms. In biology, kingdom is a taxonomic rank that is composed of smaller groups called phyla (or divisions, in plants). Supplement. Historically, kingdom is the highest taxonomic rank, or the most general taxon used in classifying organisms.