hyExplanation:1]Cell Membrane 2]Plasma Membrane 1]It SURROUNDS the entire components of the cell. 2]It surrounds only the cell organelles. 1]It regulates the TONICITY of the cell. 2]It does not regulate the tonicity of the cell. 1]Cell membrane can be TRANSFORMED to stimulate movement and feeding in organisms such as Paramaecium.  2]Plasma membrane cannot be modified. 1]It contains initial receptors for signal transduction and is the first step in cell signalling. 2]It is not the first step in cell signalling. However, it is involved in the process. 1]Always protects the cell from bacteria and viruses.  2]Does not always PROTECT the cell from outside invaders. 1]Plays an important role in cytokinesis during cell division. 2]Do not play a key role in cytokinesis during cell division. 1]Cilia are present and are involved in feeding and movement.  2]Cilia are absent. 1]Is a target for antimicrobials. 2]Is not a target for antimicrobials. pls #note 1] is for plasma membrane 2] for cell membrane