In most multicellular organisms, every cell carries the same DNA, but this genetic information is used in varying ways by different types of cells. In other words, what a cell does within an organism dictates which of its genes are expressed.
Most enlisted positions require four years of active duty. If you join the Navy through an officer program, you must serve at least four of your eight years on active duty. However, pilots and flight officers must serve a minimum of eight to 10 years of active duty. Dentists, Medical Service Corps officers and nurses must serve a minimum of three years of active duty.
How long do the members of the executive branch serve? It depends on which members of the executive branch the question is asking about. The only elected members (the President and Vice President) serve no more than two, four-yearâ¦ terms (limited by the 22nd Amendment to the Constitution). Top appointed members of cabinet departments and federal agencies serve at the discretion of the President who appointed them.