Dear Student, Cells have many organelles inside of its membrane. All organelles have specific functions that make the cell survive. The main functions of the cell are molecule transport, energy conversion and reproduction. Also, Cell membrane is dynamic in nature as it is involved in transport of molecules in and out of the cell. Cell membrane is fluid in nature because lipids present in cell membrane provide fluidity. It is known as semi permeable because only some molecules can pass through cell membrane. Thus, how a cell is dynamic in nature as it regularly produces metabolites which are being transferred and transported across different organelles and cells as per the requirement. Regards