Archaebacteria differ from eubacteria in: Cell membrane structure, Cell shape, Mode of nutrition, Mode of reproduction

Archaebacteria generally have the same shape, size, nutrition and appearance as bacteria. They multiply by means of binary fission. However, archaebacteria cell walls do not contain peptidoglycan. They also have different membrane lipid bonds as compared to the bacteria and eukarya. Archea membrane lipids have ether bonds whereas bacteria has ester-linked lipids. Thus, the correct answer is option A.