A) Is always greater than secondary productivity
B) Is always less than secondary productivity
C) Is always completely consumed by higher trophic levels
D) Is all that is needed to calculate secondary productivity

A) Is always greater, the higher you go in the food chain
B) Is an important determinant of the potential fish production in the sea
C) Is usually greater than 50 percent
D) None of the above

A) Production of the top trophic level will decrease 10 percent
B) Primary production will increase 10 percent
C) Production of the top trophic level will decrease by a factor of 10
D) Production of the top trophic level will increase by a factor of 10