Why is the cell cycle so tightly controlled in multicellular organisms?

Consider the last statement in the prompt: "people take such environmental factors into account in their choices when deciding where to live." do all people have a choice as to where they live? what factor plays a key role in this decision and may therefore play a large role in determining quality of life?

What advantages does a pedigree have over a written passage?

As scientist had investigated evolution from a variety fields they have found