The correct answer is cell differentiation
Every organism start as single cell and the single cells divide repeatedly to form adult organism. In the single, there is a DNA; it is the coding for the protein to be used by the adult organisms.
However, all the proteins will keep dividing and undergo a gene expression to become more specific cells. This process is knows as Cell differentiation.
Cell differentiation can be defined as the process in which a cell transforms from one cell type to another. The process involved in cell differentiation enables organisms such as multi-functional organisms to form functional cell types that are very unique and body plans.
The process of cell differentiation is largely motivated by genetics and the way it interacts with the environment.
The organism begins to form from a single cell and the single cell has all the DNA coding required for the proteins to be used by the adult organism.
However, the cells would seize to function if it expressed these proteins at once. For the cell to start the process of differentiation it must divide repeatedly, at this point, the cell line will start to form and the cells will become more and more specific.
As the cells become more and more specific, it will eventually form an organism that has many different cells from the process of cell differentiation.
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