Free-living soil bacteria such as Pseudomonas sp. are responsible for the ……………..process in the nitrogen cycle.
A. ammonification
B. nitrogen fixation
C. nitrification
D. denitrification
Answer:D
Free-living soil bacteria such as Pseudomonas sp. are responsible for the ……………..process in the nitrogen cycle.
A. ammonification B. nitrogen fixation C. nitrification D. denitrification