The ratio of the productivity of one trophic level over what its organisms consume is known as A. consumption efficiency B. trophic efficiency C. food chain efficiency D. detrital efficiency

Why are there not seven or eight levels to a trophic food chain? A. lack of biodiversity B. lack of global energy C. lack of trophic efficiency D. lack of primary productivity

In food web, each successive trophic level has?  A. Increased total energy  B. Less total energy content  C. More total energy content  D. Non estimated energy content

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

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

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.