In the pyramid of energy, organisms that obtain their energy from only eating primary producers are calledMultiple Choicesecondary producers.tertiary consumers.secondary consumers.tertiary producers.primary consumers.

Producers are organisms that create their own energy through a biological process. Consumers obtain energy by preying on other organisms or by eating particles of organic matter. Why are producers dependent on primary consumers?Select one:a.Producers are dependent upon primary consumers to return nutrients after they die.b.Producers depend on primary consumers for glucose, a product of photosynthesis.c.Producers depend on primary consumers for carbon dioxide, a reactant of photosynthesis.d.Producers are dependent on primary consumers to convert nitrogen into a usable form.

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.

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

What type of organism occupies the first trophic level in a food chain?Multiple choice question.primary consumerheterotrophherbivoreprimary producer

What type of organism harvests energy to build organic molecules that support animals, fungi, and all the other levels of a food web?Multiple choice question.Primary producerSecondary consumerHerbivoreHeterotroph