When an organism excretes waste, can a plant directly use it as fertilizer (nitrogen source)?

The idea of spontaneous generation was disproved by in a experiment involving jars of meat

Draw the farm's ppf for corn and beef. draw a point that shows an inefficient combination of corn and beef. label ita. draw a point that shows an unattainable combination of corn and beef. label itb. draw a point that shows an efficient combination of corn and beef. label itc.

Which of the following shows the results that you would get if you tested beef using the four tests in the gizmo