A unicellular, prokaryotic organism is discovered by scientists. Are these characteristics enough to place it in a domain, or is more information needed?

1. More information is needed because it could be a member of Bacteria or Archaea.
2. More information is needed because it could be a member of Eukarya or Archaea.
3. These characteristics are enough because it can be determined to be a member of Bacteria.
4. These characteristics are enough because it can be determined to be a member of Eukarya.