The most significant difference between archaea and bacteria is the:

A) lack of a nuclear envelope in archaea.
B) absence of the 70S ribosomes in bacteria.
C) presence of a single filament flagellum in bacteria.
D) absence of peptidoglycans in the cell walls of archaea.
E) presence of fatty acids in the plasma membranes of archaea.

Peptidoglycans

A polymer consisting of sugars and amino acids that forms a mesh-like layer outside the plasma membrane of most bacteria, providing structural support and shape.

Archaea

One of the two prokaryotic domains. The absence of peptidoglycan in their cell walls sets them apart from the bacteria. Compare with bacteria.

70S Ribosomes

Ribosomes typical in prokaryotes and mitochondria, involved in the synthesis of proteins, comprised of a 50S and a 30S subunit.