NGSS.HS-LS2-3

What percentage of energy is passed on to each tropic level?

• 10%
• 50%
• 90%
• 100%

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NGSS.HS-LS2-3

If only 10% of an organism's energy is available for the next trophic level, what happens with the other 90% of the energy?

• It is destroyed after it is used up.
• It is used for life processes or lost as body heat.
• It remains for the next trophic level IF the predator consumes ALL of the organism.
• It is lost completely as body heat. 

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NGSS.HS-LS2-3

In the energy pyramid here, how much of the energy in the producers gets passed to the herbivores?

• 10%
• 20%
• 80%
• 90%

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NGSS.HS-LS2-3

How much energy is passed on to each trophic level in an energy pyramid?

• 10%
• 90%
• 50%
• 80%

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NGSS.HS-LS2-3

Ecological efficiency from one trophic level to the next is generally:

• 1%

• 10%

• 75%

• 90%

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NGSS.HS-LS2-3

In a river ecosystem, dissolved oxygen concentrations drop quickly downstream from a point-source input of organic matter into the river due to

• increasing populations of mayfly and stonefly larvae
• increasing bacterial activity as organic matter decays
• decreasing bacterial activity as turbidity increases
• decreasing water temperature

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NGSS.HS-LS2-3

In this Food Web Pyramid, which type of consumer gets 10% of the energy stored in plants?

• Herbivore

• Carnivore

• Omnivore

• Top carnivore

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NGSS.HS-LS2-3

An organism that gets energy from breaking down dead organisms or waste ...

• producer
• consumer
• decomposer
• autotroph

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NGSS.HS-LS2-3

Saprophytes are fungi that feed on dead and decomposing organisms. They secrete enzymes that digest components of cell walls, such as cellulose and lignin.

• Saprophytes transport nutrients through the xylem and phloem in autotrophs

• Saprophytes return organic material to the soil for use by living organisms.

• Saprophytes extract minerals from living tissue to recycle them back into the soil.

• Saprophytes perform gas exchange that assists the cellular activities of autotrophs.

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NGSS.HS-LS2-3

In an ecosystem which trophic level contains the most energy?

• Tertiary Consumera

• Secondary Consumers

• Primary Consumers

• Producers

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NGSS.HS-LS2-3