The correct option is B Cell membrane
E. coli is a bacteria, which is prokaryotic and the Chlamydomonas is a eukaryotic green alga.
Bacterial cell walls are made of peptidoglycan. Algal cell walls are made of cellulose.
Prokaryotic ribosomes are 70S. Eukaryotic ribosomes are 80S.
Prokaryotic chromosomes are circular and packed along with nucleoid-associated proteins to form the nucleoid, which is in direct contact with the cytoplasm. Eukaryotic chromosomes are linear and packed along with histones to form chromatin, which is enclosed by the nuclear membrane in the nucleus.
Both bacterial and algal cell membranes consist of the phospholipid bilayer, which is described by the Fluid Mosaic Model.