During the development of an organism, from a single fertilized egg into adult form, cells become specialized through a process called differentiation.
During differentiation, genes that are activated determine the type of cell it will become. I hope that's what you need
Margaret Brown, known by her friends as Maggie, but after her death as The Unsinkable Molly Brown
George Washington was against the formation of and participation in political parties because he truly believed in Unity.
From his perspective Unity, and not Division, was the key for a democratic republic to survive. He really thought that political parties would have negative effects because they would divide and destroy the United States.
And that's the main reason why throughout his political life until his death, he was sure political parties were not needed because the country could and should function without them.
