Net primary production of an ecosystem is the amount of energyMultiple choice question.lost as heat during the metabolic processes of autotrophs.fixed by all autotrophs in an ecosystem.in the producer level that is available for consumers to eat.used by autotrophs in cellular respiration.

Which quantity indicates the food produced by an organism after it uses some of it for itself?Group of answer choicesnet ecosystem primary productiongross primary productiontotal primary productiondaily primary productionnet primary production

The energy in an ecosystem that is available for consumers to eat is called theMultiple choice question.amount of fixed nitrogen.net primary production.gross primary production.heterotroph biomass.

Net primary productivity is the primary productivity of an ecosystem, after subtracting energy lost inGroup of answer choicesdead plant tissues.inefficiencies of photosynthesis.inedible plant tissues.respiration by primary producers.respiration by primary consumers.

Net primary productivity is ________.the amount of detritus produced by an ecosystemthe biomass of producers minus that of consumersthe total biomass of an entire ecosystemthe energy used by plants to make biomass after respirationthe amount of energy consumers derive from producers

What is the primary source of energy in ecosystems?