Question

6) respiration
7) ammonification
8) combustion
9) denitrification
10) erosion


A) carbon becomes available to other organisms through this process acting on limestone.

B) this process returns nitrogen gas to the atmosphere.

C) carbon dioxide is a by-product of this biological reaction.

D) this process releases carbon from fossil fuels.

E) this process converts nitrogen into a useable from for organisms.