<P> Morphogenesis (from the Greek morphê shape and genesis creation, literally, "beginning of the shape") is the biological process that causes an organism to develop its shape . It is one of three fundamental aspects of developmental biology along with the control of cell growth and cellular differentiation, unified in evolutionary developmental biology (evo - devo). </P> <P> The process controls the organized spatial distribution of cells during the embryonic development of an organism . Morphogenesis can take place also in a mature organism, in cell culture or inside tumor cell masses . Morphogenesis also describes the development of unicellular life forms that do not have an embryonic stage in their life cycle, or describes the evolution of a body structure within a taxonomic group . </P>

Which of the following is not part of morphogenesis