What happens to the energy not immediately used by an organism?

In the ocean why are the greatest amount of primary producers found in the epipelagic zone and how does that affect biodiversity

Aragonite shells of clams, snails, or scleractinian corals may be preserved unaltered in cenozoic deposits, but they are generally dissolved or recrystallized in older deposits. true or false

If a force of 40 newtons moves a cart a distance of 9 meters, the work done is nm. if the same force moves the same cart three times that distance, the work done is nm.