1. in an ecosystem with four levels—producers, primary consumers, and two higher-level consumers—describe where the decomposers operate relative to the other trophic levels. provide at least two examples of organisms at each level.

Plant decomposers would operate above the producer level. Two examples are earthworms and fungi. These would decompose dead plant matter into nutrients that are then re-assimilated by plants. Animal decomposers operate within the consumer levels, and would include species such as maggots, shrimp, clams, crabs, lobsters and flatworms. Nutrients recycled by these decomposers would also be recycled back to the producers.

Biochemistry, it deals with the chemical constitution, the breakdown and the synthesis of plant and animal products.