1 The shape of the total product curve is determined by the marginal product of the variable factor, in this case labor. 2  As we increase the amount of labor, with a fixed factor, initially the marginal productivity of the variable factor (labor) goes up, as it gets better synchronized with the fixed factors. Upto this point (B) the total product increases at an increasing rate. 2  When the marginal productivity reaches its maximum, the total product reaches an inflexion point, and from that point on it increases but at a decreasing rate (B to C.).
Selection for commander -- the O-4 officer pay grade equivalent to a major in the Army, Air Force or Marine Corps -- requires that the candidate for promotion must have served three years as a lieutenant to meet the required time-in-grade.A lieutenant must also have between nine and 11 years of military service.ommander. Reaching the rank of commander, O-5, from the rank of lieutenant commander requires an officer to have served a total of three years as a lieutenant commander to meet the time-in-grade requirement. The officer must also have between 15 and 17 years of total military service.
Marine Biologist Education Requirements. A career in marine biology is one that can take you heights. Depending on how far you want to take yourself in the field of marine biology, you can determine the level of degrees you will need to master in school.The entry-level jobs in marine biology will require a Bachelorâs Degree, but to be able to conduct your own research you will need to obtain a Masterâs Degree.Classes needed for a marine biologist would be chemistry, biology, zoology, physics, and mathematics.epending on how far you want to take yourself in the field of marine biology, you can determine the level of degrees you will need to master in school. The entry-level jobs in marine biology will require a Bachelorâs Degree, but to be able to conduct your own research you will need to obtain a Masterâs Degree.