Answer:
D) lack peptidoglycan in their cell wall.
Explanation:
Archaea is a group of unicellular prokaryotes which shows the characteristics of the eukaryotes and eubacteria.
The Archaea since prokaryotic in origin lack the well-defined nucleus and organelles and resemble the bacteria but they differ from the bacteria in the composition of the cell wall.
The cell wall of the bacteria contains the peptidoglycan layer in the cell wall but the archaea lack the peptidoglycan but posses peptidoglycan like a molecule layer called pseudo-peptidoglycan layer with different sugar.
Thus, Option-D is the correct answer.