C₄ plants are more efficient in photosynthesis than C₃ plants due to 

• higher leaf area

• the presence of a larger number of chloroplasts

• the presence of thin cuticle

• Lower rate of photorespiration

B.

the presence of a larger number of chloroplasts

Like Plants, alage have cell walls contain either polysaccharides such as cellulose (a glucan) or a variety of glycoproteins or both. The inclusion of additional polysaccharide in algal cell walls is used as a feature for algal taxonomy. Mannas form microbibrils in the cell walls of a number of marine green alge including those from the genera Codium, Acetabularia as well as in the walls of some red algae including those from the gera Codium, Acteabularia as well as in the walls of some red algae like Porpyra.