 For example, the cell membrane that forms a barrier between the inside and outside of the cell is a lipid bilayer that forms as result of the thermodynamic properties of the phospholipids it's made of (hydrophilic head and hydrophobic tails).Exploratory processes are selective processes that operate within individual organisms during their lifetimes.In many animals, the vascular, immune and nervous systems develop by producing a variety of forms, and the most functional solutions are selected for and retained, while others are lost.