The diagram shows part of a food web. ant caterpillar eagle grass goat locust tree beetle flowering plant fox small bird How many herbivores are shown...

5090_s11_qp_12

MCQ

2011

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A tree has insect larvae burrowing in its leaves. The emerging insects are eaten by birds and the birds have parasitic fleas living amongst their feathers. Which is a pyramid of biomass and which is a pyramid of numbers for this food chain?

5090_s13_qp_11

MCQ

2013

Paper 1, Variant 1

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The diagram shows a food chain. grass → rabbit → fox → flea Which pyramid of numbers matches this food chain?

5090_s14_qp_11

MCQ

2014

Paper 1, Variant 1

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shows a food chain. bird caterpillar tree Name the trophic level of each of the following organisms in the food chain shown in . tree caterpillar In the space below, draw a pyramid of biomass for the food chain shown in . Label each of the trophic levels. Describe how the pyramid of numbers for the food chain shown in would differ from the pyramid of biomass. Give an explanation for your answer. Some farmers keep animals that they will sell for people to eat. Suggest why these farmers may restrict the activity of these animals and keep the surrounding temperature close to the body temperature of the animals.

5090_s14_qp_21

THEORY

2014

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The diagram shows a food chain. tree → mice → cats → fleas What is the shape of the pyramid of numbers for this food chain?

5090_s17_qp_11

MCQ

2017

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Insects feed on a tree’s leaves. The insects are eaten by small birds that are the prey of larger birds. Which pyramid of numbers illustrates this food chain?

5090_s17_qp_12

MCQ

2017

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This is a simple food chain: tree → insect → bird → fox Draw and label a pyramid of biomass for this food chain. Explain why only a small proportion of the energy in the insects passes to the birds. The foxes are infested with fleas (small, blood-sucking insects). Draw and label a pyramid of numbers for the complete food chain including the fleas.

5090_s17_qp_22

THEORY

2017

Paper 2, Variant 2

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Which sequence is a food chain?

5090_s18_qp_11

MCQ

2018

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A food chain is shown...

5090_s18_qp_12

MCQ

2018

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The diagram shows a food chain. grasses → zebras → lions → fleas Which pyramid of numbers would represent this food chain?

5090_s20_qp_11

MCQ

2020

Paper 1, Variant 1

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