Ecosystems: Structure, Functions & Bio-Chemical Cycles Quiz — 7 Free Questions

Question 1

What real reason actually explains why roughly ninety percent of the energy at each trophic level actually never reaches the next level up?

Question 2

What real importance does studying ecosystems and their own biogeochemical cycles actually hold for conservation and environmental policy?

Question 3

What term describes the gradual, excessive build-up of nutrients, such as phosphorus and nitrogen, within an aquatic ecosystem such as a lake?

Question 4

What real impact does burning fossil fuels actually have on the carbon cycle, releasing carbon that had been locked away for millions of years?

Question 5

What term describes ecological succession that actually begins on a surface that once actually supported life, such as land cleared by a fire or a flood?

Question 6

What real ecosystem type actually shows an upright pyramid of biomass, since its own plants hold considerably more mass than the animals feeding on them?

Question 7

What overall lesson do productivity and ecological succession, covered across this whole pack, together actually teach about an ecosystem?

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About Ecosystems: Structure, Functions & Bio-Chemical Cycles

This quiz opens with an ecosystem's own basic structure, its biotic and abiotic components, producers, consumers, and decomposers, and the levels of organisation, from population and community right through to biome.

It then covers how an ecosystem actually functions, food chains and food webs, trophic levels, the one-way flow of energy, the ten percent law, and the pyramids of numbers, biomass, and energy that actually describe it.

A considerable part of this quiz is devoted to productivity and ecological succession, gross and net primary productivity, and the gradual, real process by which a bare rock or a shallow pond actually develops into a mature, stable climax community.

It closes with the major biogeochemical cycles, carbon, nitrogen, phosphorus, sulfur, water, and oxygen, and the genuine human impact on them, including biomagnification, eutrophication, and the role of keystone and indicator species.