What are three organ systems that work together to achieve a successful pregnancy

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?

Is dna the same in every cell in the human body explain your answer