AP Biology Ecology and Energy Transfer

The flow of energy in an ecosystem is best described as energy moving in

• one direction from the Sun to the producers and then to the consumers

• one direction from a consumer to a producer and then to the Sun as heat and light

• two directions between the producers that are present

• two directions, back and forth, between the producers and the consumers

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

The diagram represents different feeding levels in an energy pyramid.

The most likely explanation for showing fewer organisms at each feeding level going up the pyramid is that

• some energy is lost to the environment as heat

• the larger the organism, the less energy it requires

• some energy is recycled within each level and remains there

• decomposers convert most of the energy into inorganic compounds

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NGSS.MS-LS2-3

Letter A in the pyramid represents

• scavengers

• producers

• carnivores

• herbivores

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NGSS.MS-LS2-3

The organisms in a pond and the physical factors influencing them best describe

• a population

• an ecosystem

• a biosphere

• a food chain

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NGSS.MS-LS2-1

NGSS.MS-LS2-3

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Four levels of an energy pyramid are represented in the diagram.

Which statement about this energy pyramid is correct?

• Organisms in level 4 receive their energy directly from the Sun.

• Organisms in level 2 are carnivore

• Organisms in level 2 receive their energy from level 3.

• Organisms in level 1 are autotrophic.

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NGSS.MS-LS2-3

A fruit fly is classified as a consumer rather than as a producer because it is unable to

• reproduce asexually

• synthesize its own food

• release energy stored in organic molecules

• remove wastes from its body

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NGSS.MS-LS2-3

Which sequence best represents the flow of energy through an ecosystem?

• Sun → green plants → herbivores → carnivores

• Sun → herbivores → producers → consumers

• green plants → carnivores → consumers → herbivores

• consumers → carnivores → herbivores → producers

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

Energy from nutrients is transferred to ATP in

• level 1, only

• levels 2, 3, and 4, only

• levels 2 and 3, only

• levels 1, 2, 3, and 4

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NGSS.MS-LS1-7

The greatest amount of available energy is transferred from

• level 1 to level 2

• level 2 to level 1

• level 1 to level 3

• level 4 to level 3

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NGSS.MS-PS3-4

NGSS.MS-PS3-5

Which graph best represents the relative energy content of the levels of this pyramid?

• 
• 
• 
• 

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NGSS.MS-LS1-6

NGSS.MS-LS2-3