IB Biology Communities and Ecosystems

Observe the food chain above. Which organism’s population would increase if finches were removed from the ecosystem?

• Grass

• Grasshopper

• Snake

• Hawk

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NGSS.MS-LS2-1

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An animal that eats only plants is called a -

• carnivore

• omnivore

• insectivore

• herbivore

What is a part of the food chain that makes its own food and nutrients?

• consumer

• producer

• omnivore

• sun

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

Which of the following organisms is a herbivore?

• fox

• ladybug

• butterfly

• snake

How many predators does the squid have?

• 3

• 4

• 2

• 1

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NGSS.MS-LS2-2

How might a lack of sunlight disrupt the food web?

• It would cause consumers to consume less.

• It would prevent decomposers from decomposing matter.

• It would prevent producers from producing nutrients

• It would not disrupt the food web at all.

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NGSS.MS-LS1-6

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

How are primary consumers different from secondary consumers?

• Primary consumers eat only plants; secondary consumers eat other consumers.

• Primary consumers eat other consumers; secondary consumers eat only plants.

• Primary consumers eat plants and other consumers; secondary consumers eat plants and decompose matter.

• . Primary consumers eat plants and decompose matter; secondary consumers eat plants and other consumers.

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NGSS.MS-LS2-3

This organism is most likely:

• A primary consumer

• A secondary consumer

• A decomposer

• A producer

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NGSS.MS-LS2-3

The efficiency of energy transfer from a lower trophic level to the next highest level is roughly

• 1%
• 10%
• 100%
• 1000%

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

Trophic levels are represented by 

• squares
• circles
• pyramids
• lines