Biogeochemical Cycles and Energy Flow

The major role of detritivores in ecosystems is to

• provide a nutritional resource for heterotrophs

• recycle chemical nutrients to a form capable of being used by autotrophs

• prevent the buildup of the organic remains of organisms, feces, and so on

• return energy lost to the ecosystem by other organisms

Tags

NGSS.MS-LS2-3

Which trophic level is most vulnerable to extinction?

• producer level

• primary consumer level

• secondary consumer level

• tertiary consumer level

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NGSS.MS-LS2-4

NGSS.MS-LS4-1

Consider the food chain grass-->grasshopper -->mouse -->snake -->hawk. How much of the chemical energy fixed by photosynthesis of the grass (100%) is available to the hawk?

• 0.01%

• 0.1%

• 1%

• 10%

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NGSS.MS-LS2-3

NGSS.MS-LS1-6

Which of the following locations is the reservoir (storage) for carbon in the carbon cycle?

• plant and animal biomass

• sediments and sedimentary rocks

• fossilized plant and animal remains (coal, oil, and natural gas)

• all of the above

Tags

NGSS.HS-ESS2-6

How does phosphorus normally enter ecosystems?

• cellular respiration

• photosynthesis

• rock weathering

• vulcanism

Tags

NGSS.MS-LS2-3

NGSS.MS-ESS2-1

Figure 42.2 Diagram of a food web (arrows represent energy flow and letters represent species)

If Figure 42.2 represents a terrestrial food web, the combined biomass of C + D would probably be

• less than the biomass of A + B

• less than the biomass of F

• greater than the biomass of A

• greater than the biomass of B

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NGSS.MS-LS2-3

NGSS.MS-LS2-1

Which series correctly models the flow of energy in an aquatic food chain?

• plankton -->sand eel-->striped bass-->cod

• sand eel-->cod-->plankton-->striped bass

• striped bass-->plankton-->cod-->sand eel

• cod-->striped bass-->sand eel-->plankton

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NGSS.MS-LS2-3

Study the carbon cycle diagram. Which arrow represents the release of carbon dioxide through combustion?

• arrow 1

• arrow 2

• arrow 3

• arrow 4

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NGSS.MS-ESS2-1

Study the diagram. Which element moves through ALL parts of this cycle?

• carbon

• nitrogen

• oxygen

• phosphorus

Tags

NGSS.MS-LS2-3

Which sequence is part of the carbon cycle?

• transpiration-->evaporation-->condensation-->precipitation

• respiration-->photosynthesis-->organic decay-->coal formation

• combustion-->evaporation-->respiration-->condensation

• decomposition-->infiltration-->plant uptake-->consumption

Tags

NGSS.MS-LS2-3

NGSS.MS-ESS2-1

NGSS.MS-LS1-6