Bacteria are different from archaea in features of cell structure and chemical makeup. True or False?

True.


A defining physiological characteristic of Archaea is their ability to live in extreme environments. Thus, these organisms are called “extremophiles” and, unlike Eubacteria, they depend for survival on environmental conditions such as high salinity, extremes of temperature, unusual chemical substrates, or high pressure.


Therefore, Archaebacteria have more specialized enzymatic and cellular structures uniquely designed to endure harsh environmental conditions.


For example, Hyperthermophiles have increased membrane fluidity due to branched glycerol tetraethers, and often lack a cell wall. Psychrophiles have lipids comprising mainly unsaturated fatty acids.