Which one of the following statement is correct for archaea?
A. Archaea resemble eukaryotes in all respects.
B. Archaea have some novel features that are absent in other prokaryotes and eukaryotes.
C. Archaea completely differ from both prokaryotes and eukaryotes.
D. Archaea completely differ from prokaryotes.
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Correct Answer : B.
Archaebacteria are found in most harsh habitats. Their cell wall is adapted to tolerate extreme conditions (wall contains protein and non-cellulosic polysaccharides). Cell membranes are characterized by the presence of branched chain lipids that make them highly resistent to heat and low pH.