Ecosystems and Biomes Quiz

Question 1In a food-chain model, 1800 kJ is available at one level and 12% transfers to the next. Find the energy transferred in kJ, rounded to one decimal place.

Enter a number in kJ.

Answers within 0.05 kJ of the expected value are accepted.

Question 2A measured transfer starts with 750 kJ and delivers 90 kJ to the next trophic level. Find the percentage not transferred, rounded to one decimal place.

Enter a number in %.

Answers within 0.05 % of the expected value are accepted.

Question 3A study includes a pond’s organisms, water chemistry, and sediment exchanges. What is its unit of study?

A habitat defined by a species’ worldwide geographic rangeA species consisting of the pond’s interacting organismsA biome identified from the organisms living in one pondA system of organisms interacting with their physical surroundings

Question 4Two woodland birds forage at different heights in the same patch. What distinction describes their use of the setting?

Their overlapping habitat gives them a shared nicheThey share a habitat while occupying different nichesThey occupy different climate zones within the same treeDifferent foraging branches put them in separate biomes

Question 5During growth and decay, a nitrogen atom moves from soil into a plant and later returns. What process is illustrated?

The destruction of the atom during plant respirationMatter cycling among living tissue and environmental storesA trophic rank rising each time the atom changes locationEnergy being recycled into the original sunlight

Question 6Regions with similar annual rainfall support different vegetation where fire seasons and drainage differ. What explains this?

Disturbance and soil-water conditions modify climatic limitsVegetation in burned areas grows independently of waterAnnual rainfall fixes vegetation independently of timingPlants sharing a mapped climate zone have matching growing conditions

Question 7A small predator alters the behavior and abundance of several prey species. What does this show about food webs?

Ecological effects need not match an organism’s biomassEach predator adds the energy consumed by its preyFeeding position measures an organism’s conservation valueThe heaviest organism performs the most important role

Question 8Clearer water appears shortly after restoration, but breeding success is still poor. Which follow-up fits the original ecological goal?

Stop measuring after the first favorable sensor readingReplace breeding records with photographs of the shorelineDeclare breeding has recovered when the water clearsMonitor reproduction and relevant conditions through seasons

Question 9Grassland gradually becomes woodland across a moisture gradient. How should a map’s sharp boundary be interpreted?

A physical fence preventing organisms from crossingA division where the communities change without a transitionA simplified representation of a broader transition zoneAn error in assigning overlapping communities to the region

Question 10A wetland proposal lists flood regulation and recreation benefits but also changes access for nearby residents. What belongs in the decision?

The combined benefits distributed equally by assumptionThe wetland area as the monetary value of each household’s gainThe recipients of benefits and the people bearing costsThe recreational benefit sufficient to cancel access losses

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Ecosystems and Biomes Quiz

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