A single-celled organism isolated from a deep-sea, hot thermal vent was found to have a cell wall but lacked a nucleus. This organism is most likely a member of which of the following domains?
A) Eukarya
B) Archaea
C) Animalia
D) Protista
E) Fungi

Question

Quizplus · Accepted Answer

Organisms that lack a nucleus and have a cell wall are classified as prokaryotes. They can be further classified into two domains: Bacteria and Archaea. Since the organism was isolated from a hot thermal vent, it is likely that it belongs to the domain Archaea, as these organisms are typically found in extreme environments. The other answer choices (Eukarya, Animalia, Protista, and Fungi) all refer to eukaryotic organisms, which have a nucleus and do not have a cell wall.

A Single-Celled Organism Isolated from a Deep-Sea, Hot Thermal Vent