Food chains and food webs — Paper 1 · IGCSE Biology (9-1) 0970

36 Black truffle is a fungus that obtains nutrients from the roots of hazel trees. Female pigs find and eat the fungi. What is the principal source of the energy for this food chain? A female pigs B hazel trees C soil D the Sun

1 marks

Answer: D

This question in 0970/11 May/June 2018

37 The diagram shows a food chain. apple tree → herbivorous insects → carnivorous insects → bird Which pyramid of numbers represents the food chain? A B C D

1 marks

Answer: B

This question in 0970/11 May/June 2018

34 The diagram shows a food web. hedgehog robin caterpillar greenfly beetle rose plant cabbage plant Which row shows a food chain in this food web? primary secondary producer consumer consumer A hedgehog caterpillar robin B cabbage plant greenfly beetle C cabbage plant beetle robin D rose plant hedgehog greenfly

1 marks

Answer: B

This question in 0970/12 Oct/Nov 2018

37 The diagram shows an aquatic food web. blue whale killer whale seagull seal fish squid zooplankton krill crab phytoplankton seaweed Which statement is correct? A There are two producers and three herbivores. B There are two primary consumers and two secondary consumers. C There are three producers and two primary consumers. D There are two herbivores and two tertiary consumers.

1 marks

Answer: A

This question in 0970/11 May/June 2019

35 Which diagram correctly shows the flow of energy? A producers consumers decomposers B consumers producers decomposers C producers consumers decomposers D decomposers consumers producers

1 marks

Answer: A

This question in 0970/12 Oct/Nov 2019

36 The diagram shows a food chain. Which organism is the secondary consumer? A B C D grass rabbit fox flea

1 marks

Answer: C

This question in 0970/12 Oct/Nov 2019

35 The diagram shows a simple food chain. grass → gazelle → lion The arrows show the energy flow through the food chain. Where does the grass obtain its energy? A oxygen from air B water C minerals in soil D the Sun

1 marks

Answer: D

This question in 0970/11 May/June 2020

36 The diagram shows a food chain in a rock pool. seaweed → whelks → crabs → seagulls What will happen if the number of secondary consumers increases? There will be A fewer crabs. B fewer seagulls. C fewer whelks. D less seaweed.

1 marks

Answer: C

This question in 0970/11 May/June 2020

36 The diagram shows a food chain in a rock pool. seaweed → whelks → crabs → seagulls What will happen if the number of secondary consumers increases? There will be A fewer crabs. B fewer seagulls. C fewer whelks. D less seaweed.

1 marks

Answer: C

This question in 0970/12 May/June 2020

35 A food chain is shown. potato plant  slug  hedgehog By which process is energy transferred from the slug to the hedgehog? A egestion B excretion C ingestion D photosynthesis

1 marks

Answer: C

This question in 0970/12 Oct/Nov 2020

36 The diagram shows a food web. energy from sunlight organism organism organism H J K organism L What is organism L? A a carnivore B a decomposer C a herbivore D a producer

1 marks

Answer: B

This question in 0970/12 Oct/Nov 2020

36 The diagram shows a food web in a desert. hawks desert foxes large lizards desert snakes small lizards kangaroo rats desert plants Which organisms are all secondary consumers? A desert foxes, hawks, large lizards and desert snakes B desert foxes and hawks only C kangaroo rats and small lizards D large lizards and desert snakes only

1 marks

Answer: A

This question in 0970/11 May/June 2021

36 The diagram shows a food chain. grass grasshopper frog snake hawk What is the tertiary consumer in this food chain? A frog B grasshopper C hawk D snake

1 marks

Answer: D

This question in 0970/12 Oct/Nov 2021

40 The food web shows the feeding relationships in a woodland. sparrowhawks chaffinches grey wood squirrels pigeons caterpillars trees If all the chaffinches in the food web die, which effect would this have? A The amount of damage to trees will increase. B The food supply for grey squirrels will increase. C The number of wood pigeons will increase. D The population of caterpillars will decrease.

1 marks

Answer: A

This question in 0970/11 May/June 2022

40 The food web shows the feeding relationships in a woodland. sparrowhawks chaffinches grey wood squirrels pigeons caterpillars trees If all the chaffinches in the food web die, which effect would this have? A The amount of damage to trees will increase. B The food supply for grey squirrels will increase. C The number of wood pigeons will increase. D The population of caterpillars will decrease.

1 marks

Answer: A

This question in 0970/12 May/June 2022

37 The diagram shows a food chain. rose bush → aphids → ladybirds → spiders A disease reduced the number of ladybirds. What would be the likely effect of this on the numbers of aphids and spiders? aphids spiders A decrease decrease B decrease increase C increase decrease D increase increase

1 marks

Answer: C

This question in 0970/12 Oct/Nov 2022

38 The block at the base of each pyramid represents the number of producers. Which pyramid of numbers has more tertiary consumers than secondary consumers? A B C D

1 marks

Answer: C

This question in 0970/12 Oct/Nov 2022

37 In a pyramid of numbers, what does the top of the pyramid represent? A carnivores B decomposers C herbivores D Sun

1 marks

Answer: A

This question in 0970/11 May/June 2023

36 Which term is used to describe an organism that makes its own organic nutrients? A carnivore B decomposer C herbivore D producer

1 marks

Answer: D

This question in 0970/12 May/June 2023

38 A single tree is food for a large population of caterpillars. Several small birds eat the caterpillars. The small birds are eaten by a bird of prey. Which is the pyramid of biomass? A B C D

1 marks

Answer: A

This question in 0970/12 May/June 2023

36 A food chain is shown. lettuce plant  slug  hedgehog By which process is energy transferred from the lettuce plant to the slug? A egestion B excretion C ingestion D respiration

1 marks

Answer: C

This question in 0970/12 Oct/Nov 2023

37 A single bush is food for a large population of greenfly. Several ladybirds eat the greenfly. The ladybirds are eaten by a bird. Which diagram shows the pyramid of numbers for this food chain? A B C D

1 marks

Answer: B

This question in 0970/12 Oct/Nov 2023

40 The diagram shows the flow of energy in an ecosystem. respiration Sun producer 1 2 death 3 Which row correctly completes boxes 1, 2 and 3? 1 2 3 A herbivore carnivore decomposer B carnivore herbivore decomposer C decomposer carnivore herbivore D carnivore decomposer herbivore

1 marks

Answer: A

This question in 0970/12 Oct/Nov 2023

34 The images show four animals. 1 2 sheep eagle 3 4 tortoise tiger Which two animals show adaptive features for being secondary consumers? A 1 and 3 B 1 and 4 C 2 and 3 D 2 and 4

1 marks

Answer: D

This question in 0970/12 May/June 2024

36 The diagram shows a food chain. plant leaf →slug →frog →fox Which terms describe the position of the fox in this food chain? consumer trophic level A quaternary fourth B tertiary third C quaternary third D tertiary fourth

1 marks

Answer: D

This question in 0970/12 May/June 2024

39 Which diagram shows a pyramid of biomass for the food chain shown? key tree caterpillar bird A B C D

1 marks

Answer: A

This question in 0970/12 Oct/Nov 2024

36 The diagram shows a food web. pike frog stickleback diving beetle water boatman water spider stonefly larva blackfly larva mayfly larva alga Which animal is a secondary consumer? A blackfly larva B diving beetle C frog D pike

1 marks

Answer: B

This question in 0970/11 May/June 2025

37 The graphs show the number of herbivores in a habitat over a period of time. At time X, the carnivores are removed from the habitat. Which graph shows the effect of this on the number of herbivores? A B number of number of herbivores herbivores X X time time C D number of number of herbivores herbivores X X time time

1 marks

Answer: A

This question in 0970/11 May/June 2025

34 The diagram shows the flow of energy in a food chain. Which organism is the producer in the food chain? organism A organism B organism C organism D

1 marks

Answer: C

This question in 0970/12 May/June 2025

32 The diagram represents part of an aquatic food web. tadpoles water beetles aquatic plants large fish small shrimps small fish Which organisms are primary consumers in this food web? A small shrimps and tadpoles B tadpoles and small fish C water beetles and large fish D water beetles and small fish

1 marks

Answer: A

This question in 0970/12 Oct/Nov 2025

33 In a greenhouse there were many aphids feeding on 10 tomato plants. A population of 20 ladybirds, which are a predator of aphids, was introduced into the greenhouse. Which pyramid of numbers correctly represents this food chain? A B C D

1 marks

Answer: C

This question in 0970/12 Oct/Nov 2025

36 The graphs show the number of carnivores in a habitat over a period of time. At time X, the herbivores in the food chain are removed from the habitat. Which graph shows the likely effect of this on the number of carnivores? A B number of number of carnivores carnivores X X time time C D number of number of carnivores carnivores X X time time

1 marks

Answer: D

This question in 0970/12 Oct/Nov 2025