I believe that on the Naive B-cell the antibodies exist as transmembrane proteins. A naive b-cell is a type of b-cell that has not been exposed to an antigen. When exposed it becomes either a memory B cell or a plasma cell that secrete antibodies specific to the antigen that was originally bound.
The cell wall is like a support structure for the plant cell, while the cytoskeleton is what gives the cell shape and coherence
D) It is based on the position of rock layers.