Which process plays an important role in the cycling of both carbon and nitrogen? a. photosynthesis b. transpiration c. decomposition d. respiration

The right answer is C. Decomposition

The decomposition of organic matter is the result of a series of chemical reactions that result in the transformation of complex organic compounds into simple inorganic compounds. The mineralization of organic matter is a fundamental process because it results in its transformation into simple elements, the only ones that can be assimilated by plants.

In fact, the decomposing microorganisms need nitrogen to degrade the carbon: when the residues to be decomposed have a C / N ratio (ratio between the total amount of carbon and the total amount of nitrogen), the microorganisms do not take up carbon. nitrogen in the medium. On the other hand, when a large quantity of high C / N residues is buried, they take up nitrogen in the soil for their own metabolism, which, under certain conditions, may compete with the plant population grown for nitrogen (" nitrogen hunger ").

c

Explanation: