3. Which is the key difference between archaea and bacteria? a) Archaea are prokaryotic while bacteria are eukaryotic.

b) Archaea can live in anaerobic conditions while bacteria can only live in aerobic
conditions.

c) Archaea can only live in less extreme conditions while bacteria can live in more
extreme conditions.

d) Archaea do not use photosynthesis as a source of metabolic energy, while some
bacteria can use photosynthesis as a source of metabolic energy.

e) Archaea have membrane-bound organelles while bacteria do not have membrane-bound organelles.