Food chains and food webs — Paper 2 · IGCSE Biology (9-1) 0970

35 The diagram shows a food chain. maize → locusts → lizards → snakes 10 000 kJ 1000 kJ 100 kJ 10 kJ What is the efficiency of energy transfer between the maize and the lizards in this food chain? A 0.01% B 0.1% C 1% D 10%

1 marks

Answer: C

This question in 0970/21 May/June 2018

36 The diagram shows part of a food web from a rainforest. jaguars anacondas harpy eagles iguanas howler monkeys fruits and leaves In this food web, at which trophic level are the anacondas? A primary consumers B secondary consumers C tertiary consumers D quaternary consumers

1 marks

Answer: B

This question in 0970/21 May/June 2018

35 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 0970/22 Oct/Nov 2018

37 Which trophic level has the greatest amount of energy? A B C D 1 mahogany tree with → 1500 aphids → 10 small birds → 2 eagles several thousand leaves

1 marks

Answer: A

This question in 0970/22 May/June 2019

34 The diagram shows a pyramid of biomass. X Which organisms are found in position X? A decomposers B herbivores C primary consumers D producers

1 marks

Answer: D

This question in 0970/22 Oct/Nov 2019

35 What is a trophic level? A a group of interconnected food chains B all of the consumers in an ecosystem C an organism’s position in a food web D the transfer of energy between organisms

1 marks

Answer: C

This question in 0970/22 Oct/Nov 2019

35 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 0970/21 May/June 2020

35 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 0970/22 May/June 2020

35 The diagram shows a pyramid of numbers. level 3 2 1 What is the correct description of the trophic levels? trophic level 1 2 3 A producers primary consumers secondary consumers B producers secondary consumers tertiary consumers C secondary consumers primary consumers producers D secondary consumers tertiary consumers producers

1 marks

Answer: A

This question in 0970/22 Oct/Nov 2020

37 The diagram shows the flow of energy. 1 3 Sun grass rabbit fox Which form of energy is transferred at points 1 and 3 in the diagram? 1 3 A chemical chemical B heat light C light chemical D light heat

1 marks

Answer: C

This question in 0970/21 May/June 2021

38 The diagram shows the feeding relationships in a food web. fox owl blackbird rabbit mouse grasshopper grass wheat Which organism may feed as both a secondary and a tertiary consumer? A fox B owl C blackbird D rabbit

1 marks

Answer: A

This question in 0970/21 May/June 2021

37 Which type of energy is passed from organism to organism in a food chain? A light B chemical C heat D kinetic

1 marks

Answer: B

This question in 0970/22 May/June 2021

38 The diagram shows a food web. brown trout dragonfly nymph mayfly freshwater nymph shrimp microscopic pondweed alga How many organisms feed at more than one trophic level? A 0 B 1 C 2 D 3

1 marks

Answer: B

This question in 0970/22 May/June 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 0970/21 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 0970/22 May/June 2022

35 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 0970/22 May/June 2023

36 The diagram shows two pyramids based on food chains in which the producer is a large tree. P Q What do the two pyramids represent? P Q A biomass biomass B biomass numbers C numbers biomass D numbers numbers

1 marks

Answer: B

This question in 0970/22 May/June 2023

36 The diagram shows a food chain. tree → insect → blue tit → hawk Which statement about a pyramid based on this food chain is correct? A Drawn as a pyramid of biomass, the hawk would have the largest bar size. B Drawn as a pyramid of energy, the tree would have the largest bar size. C Drawn as a pyramid of energy, the tree would have the smallest bar size. D Drawn as a pyramid of numbers, the hawk would have the largest bar size.

1 marks

Answer: B

This question in 0970/22 Oct/Nov 2023

34 The diagram shows the amount of energy in kJ m–2 yr–1 at each trophic level of a food chain. producers primary consumers secondary consumers 88 000 14 000 2000 Approximately how much energy is lost between the producers and the secondary consumers? A 0.2% B 2.0% C 84% D 98%

1 marks

Answer: D

This question in 0970/22 Oct/Nov 2024

34 Which statement about a pyramid of energy for a food chain is correct? A It shows how energy is lost at each trophic level. B It shows the energy stored at each trophic level. C It shows the input of energy from the principal source. D It shows the total energy stored within an ecosystem.

1 marks

Answer: B

This question in 0970/21 May/June 2025

35 The food web shows part of an ocean ecosystem. orca whale seal sea lion sea otter sea urchin mussel clam prawn kelp algae diatom Which row shows the number of secondary consumers and the number of tertiary consumers in the food web? number of number of secondary tertiary consumers consumers A three one B four one C three two D four two

1 marks

Answer: B

This question in 0970/21 May/June 2025

36 In a food chain, zebras are large mammals that eat grass. The zebras have many insects living on them which suck their blood. Birds eat the insects. The diagrams show some biological pyramids. 1 2 3 4 Which row identifies the types of pyramids for this food chain? pyramid of pyramid of energy numbers A 4 2 B 3 2 C 3 1 D 4 1

1 marks

Answer: C

This question in 0970/22 May/June 2025

35 Which unit could be used for the measurements needed to construct a pyramid of energy? A kJ per g per m2 B kJ per kg per year C kJ per m2 per year D kJ per kg

1 marks

Answer: C

This question in 0970/22 Oct/Nov 2025