Question

prokaryotic cells
contains unique rrna
live in extreme environments
cell walls contain no peptidoglycan
membranes composed of branched hydrocarbon chains

the characteristics listed above describe the domain

a archaea

b bacteria

c eukarya

d monera

Explanation:

The listed characteristics (prokaryotic cells, unique rRNA, extreme environment habitat, no peptidoglycan in cell walls, membranes with branched hydrocarbon chains) are defining features of the domain Archaea. Bacteria have peptidoglycan cell walls; Eukarya are eukaryotic; Monera is an outdated taxon.

Answer:

A. Archaea