What happens to most of the nitrogen in a plant when the plant dies? a. it remains in the dead plant. b. it is absorbed directly into animals. c. it moves into the atmosphere. d. it goes back into the soil.

D. It goes back into the soil.

Nitrogen is the part of amino acids, nucleic acids and chlorophyll and other pigments of the plant when the plant dies the plant body get decomposed by the soil microbes like fungi and bacteria. These microbes turn the nitrogen into ammonia in the soil which is again utilized by the living plants for their growth.

helicase, i think thats it

organ system-an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.