Which of the following best matches the description?Bacteria that convert atmospheric nitrogen gas into forms of nitrogen that plants can use.
A. nitrogen-fixing bacteria
B. limiting factor
C. producer
D. omnivore
E. nitrogen cycle
F. carbon cycle
G. ectoparasite
H. biomass
I. intraspecific competition
J. denitrifying bacteria
K. habitat
L. trophic level
M. interspecific competition
N. secondary consumer
O. community
P. herbivore
Answer: A
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