A) An ecosystemʹs trophic structure determines the rate at which energy cycles within the system. B) At any point in time, it is impossible for consumers to outnumber producers in an ecosystem. C) Chemoautotrophic prokaryotes near deep-sea vents are primary producers. D) There has been a well-documented increase in atmospheric nitrogen over the past several decades. E) The reservoir of ecosystem phosphorous is the atmosphere.
