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)Plantae
E)Fungi

Question

Quizplus · Accepted Answer

The presence of a cell wall suggests that the organism is prokaryotic, which means it lacks a nucleus. This rules out options A, C, D, and E, all of which contain eukaryotic organisms. The fact that the organism was isolated from a deep-sea, hot thermal vent further suggests that it is a member of the Archaea domain, which contains extremophiles that live in extreme environments such as hot springs, geysers, and deep-sea vents.

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