Which of the following best matches the description?Stage in the flow of energy in an ecosystem.

A. habitat
B. secondary consumer
C. interspecific competition
D. producer
E. biomass
F. community
G. intraspecific competition
H. limiting factor
I. ectoparasite
J. herbivore
K. nitrogen-fixing bacteria
L. carbon cycle
M. nitrogen cycle
N. omnivore
O. trophic level
P. denitrifying bacteria


Answer: O

Environmental & Atmospheric Sciences

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