Food chains and food webs — Paper 2 · IGCSE Science - Combined 0653

12 Energy flows along a food chain. What does every food chain start with? A carnivore B consumer C herbivore D producer

1 marks

Answer: D

This question in 0653/22 Feb/March 2017

12 Which type of organism makes its own organic nutrients? A carnivore B consumer C herbivore D producer

1 marks

Answer: D

This question in 0653/21 May/June 2017

12 Which statement about decomposers is not correct? A They are the final stage of food chains. B They break down dead organic matter. C They produce oxygen. D They release heat energy into the environment.

1 marks

Answer: C

This question in 0653/23 May/June 2017

12 The diagram shows a food web. hawk song bird spider locust beetle tree grass Which statement about this food web is correct? A Some of the energy from the grass eventually passes to the hawk. B The producers get their energy from the soil. C There are more carnivores shown than herbivores. D There are six consumers shown.

1 marks

Answer: A

This question in 0653/22 Oct/Nov 2017

12 The diagram shows the trophic levels of a food chain. producer herbivore carnivore carnivore → → → 1st trophic 2nd trophic 3rd trophic 4th trophic level level level level Why do most food chains not have more than four trophic levels? A There are too many carnivores in the 3rd trophic level. B There are too many herbivores in the 2nd trophic level. C There is no energy transferred from the 2nd trophic level to the 3rd trophic level. D There is not enough energy available to be transferred to a 5th trophic level.

1 marks

Answer: D

This question in 0653/23 Oct/Nov 2017

12 At which trophic level in a food chain does transpiration occur? A trophic level 1 B trophic level 2 C trophic level 3 D trophic level 4

1 marks

Answer: A

This question in 0653/21 May/June 2018

11 In a food chain, the energy transferred from the first trophic level to the second trophic level is greater than the energy transferred from the second trophic level to the third trophic level. Which process is not a reason for this difference? A egestion B excretion C movement D photosynthesis

1 marks

Answer: D

This question in 0653/22 May/June 2018

13 The diagram shows how energy flows through a food chain. Sun Y Y Y X Z Z producer herbivore carnivore What are the main energy transfers shown by arrows X, Y and Z? X Y Z A chemical → chemical chemical → heat chemical → light B chemical → chemical chemical → light chemical → light C light → chemical chemical → heat chemical → chemical D light → chemical chemical → light chemical → chemical

1 marks

Answer: C

This question in 0653/23 May/June 2018

12 What is the definition of a trophic level? A It shows how an organism loses energy. B It shows the position of an organism in a food chain. C It shows the consumers of an organism. D It shows the food eaten by an organism.

1 marks

Answer: B

This question in 0653/21 Oct/Nov 2018

12 What is the definition of a trophic level? A It shows how an organism loses energy. B It shows the position of an organism in a food chain. C It shows the consumers of an organism. D It shows the food eaten by an organism.

1 marks

Answer: B

This question in 0653/22 Oct/Nov 2018

12 What is the definition of a trophic level? A It shows how an organism loses energy. B It shows the position of an organism in a food chain. C It shows the consumers of an organism. D It shows the food eaten by an organism.

1 marks

Answer: B

This question in 0653/23 Oct/Nov 2018

11 The graph shows the energy content of organisms at each trophic level in a food chain. Which letter represents the primary consumers? 1000 100 energy / arbitrary 10 units 1 0 A B C D

1 marks

Answer: C

This question in 0653/22 Feb/March 2019

12 The diagram shows a food web from the African grasslands. hawk leopard baboon snake tick bird scorpion tick impala locust seed-eating bird grass Which row correctly identifies the positions of the organisms in the food web? primary secondary tertiary consumer consumer consumer A grass seed-eating bird locust B impala tick leopard C locust scorpion tick bird D seed-eating bird tick bird baboon

1 marks

Answer: C

This question in 0653/21 May/June 2019

11 The diagram represents several food chains in a food web. kestrel cat wolf small bird rat sheep ant grasshopper grass How many different food chains are there in the food web shown? A 3 B 4 C 5 D 9

1 marks

Answer: C

This question in 0653/22 May/June 2019

13 The diagram shows a food web. eagle fox stoat rabbit grasshopper grass Which type of organism is not represented in this food web? A carnivore B consumer C decomposer D herbivore

1 marks

Answer: C

This question in 0653/23 May/June 2019

12 The diagram shows a food web. cat sparrowhawk thrush robin frog snail slug caterpillar delphinium nasturtium cabbage How could the frog be classed? A second trophic level and secondary consumer B second trophic level and tertiary consumer C third trophic level and secondary consumer D third trophic level and tertiary consumer

1 marks

Answer: C

This question in 0653/22 Oct/Nov 2019

12 The diagram shows a food web. seal gull octopus crab starfish periwinkle limpet seaweed Which organism is found in more than one trophic level? A crab B gull C octopus D starfish

1 marks

Answer: B

This question in 0653/23 Oct/Nov 2019

13 The diagram shows the trophic levels of a food chain. producer herbivore carnivore carnivore    1st trophic 2nd trophic 3rd trophic 4th trophic level level level level Why do most food chains not have more than four trophic levels? A There are too many carnivores in the 3rd trophic level. B There are too many herbivores in the 2nd trophic level. C There is no energy transferred from the 2nd trophic level to the 3rd trophic level. D There is not enough energy available to be transferred to a 5th trophic level.

1 marks

Answer: D

This question in 0653/22 Oct/Nov 2020

13 Some stages in the process of eutrophication are listed. 1 reduction in dissolved oxygen 2 increased aerobic respiration by decomposers 3 increased availability of nitrates 4 death of organisms requiring dissolved oxygen 5 increased growth of producers and increased decomposition after death of producers In which sequence do these stages take place? A 1  4  3  5  2 B 3  1  5  2  4 C 3  5  2  1  4 D 4  3  1  2  5

1 marks

Answer: C

This question in 0653/23 Oct/Nov 2020

13 What is the name given to the position of an organism in a food chain? A ecosystem B energy content C trophic level D tropism

1 marks

Answer: C

This question in 0653/22 Feb/March 2021

12 The diagram shows a food web. eagle fox small bird goat ant caterpillar locust beetle grass wildflower tree Which row states the number of species of each category in this food web? number of primary number of secondary number of tertiary consumer species consumer species consumer species A 6 1 1 B 5 2 1 C 5 2 2 D 3 4 3

1 marks

Answer: B

This question in 0653/21 May/June 2021

12 The diagram shows a food web. cat sparrowhawk thrush robin frog sparrow slug caterpillar plant Which row shows the correct organism for each trophic level? trophic level 1 trophic level 2 trophic level 3 A cat sparrow plant B caterpillar robin sparrowhawk C plant sparrow cat D sparrowhawk robin caterpillar

1 marks

Answer: C

This question in 0653/22 May/June 2021

12 In which food chain does the final consumer receive the most energy from the producer? primary secondary tertiary quaternary A producer     consumer consumer consumer consumer primary secondary tertiary B producer    consumer consumer consumer primary secondary C producer   consumer consumer primary D producer  consumer

1 marks

Answer: D

This question in 0653/23 May/June 2021

12 The diagram represents four organisms in a food chain. T  U  V  W Which organisms are consumers? A T, U and V B T, U and W C T, V and W D U, V and W

1 marks

Answer: D

This question in 0653/21 Oct/Nov 2021

12 The diagram represents four organisms in a food chain. T  U  V  W Which organisms are consumers? A T, U and V B T, U and W C T, V and W D U, V and W

1 marks

Answer: D

This question in 0653/22 Oct/Nov 2021

13 During eutrophication, what is the main reason for the increased growth of producers? A increased availability of carbon dioxide B increased availability of nitrate C increased availability of oxygen D increased availability of water

1 marks

Answer: B

This question in 0653/22 Oct/Nov 2021

12 The diagram represents four organisms in a food chain. T  U  V  W Which organisms are consumers? A T, U and V B T, U and W C T, V and W D U, V and W

1 marks

Answer: D

This question in 0653/23 Oct/Nov 2021

12 A human eats vegetables. Which row describes the position of the human in the food chain? consumer trophic level A primary first B primary second C secondary first D secondary second

1 marks

Answer: B

This question in 0653/22 Feb/March 2022

12 The diagram shows part of a food web. fox eagle stoat rabbit small bird caterpillar ant beetle locust grass flowering plant tree Which animal is a quaternary consumer only? A eagle B fox C locust D small bird

1 marks

Answer: A

This question in 0653/21 May/June 2022

13 What is an ecosystem? A a habitat containing organisms interacting together, in a given area B a unit containing all of the organisms and their environment, interacting together, in a given area C an environment containing some organisms, interacting together D the positions of organisms in a food web, interacting together, with the environment, in a given area

1 marks

Answer: B

This question in 0653/22 May/June 2022

13 The diagram shows a food chain from an ocean ecosystem. microscopic plants  krill  small fish  tuna  shark What is the trophic level of the tuna? A primary consumer B quaternary consumer C secondary consumer D tertiary consumer

1 marks

Answer: D

This question in 0653/23 May/June 2022

13 The diagram shows a food web. foxes lizards kestrels carnivorous spiders stoats insects herbivorous voles rabbits insects vegetation Which organisms in this web are quaternary consumers? A carnivorous insects and foxes B foxes and lizards C kestrels and stoats D lizards and stoats

1 marks

Answer: B

This question in 0653/22 Oct/Nov 2022

12 A woodland consists of trees, other plants and animals. Which term describes this woodland and the interaction of its living things with each other and their environment? A ecosystem B food web C habitat D trophic level

1 marks

Answer: A

This question in 0653/22 Feb/March 2023

13 The concentration of nitrate ions in a lake increases. Why does this result in a decrease in the number of fish in the lake? A There is a decrease in the decomposition of producers. B There is a decrease in the growth of producers. C There is an increase in aerobic respiration by decomposers. D There is an increase in dissolved oxygen.

1 marks

Answer: C

This question in 0653/22 Feb/March 2023

12 Which letter represents the secondary consumer in the food chain shown? A B C D

1 marks

Answer: C

This question in 0653/21 May/June 2023

12 The diagram shows part of a food web. snake jaguar macaw monkey frog fruit bat tapir water weevil banana fruit water weed Which row gives the number of each type of consumer? primary secondary tertiary A 2 2 0 B 2 5 3 C 5 1 0 D 5 3 1

1 marks

Answer: D

This question in 0653/22 May/June 2023

12 The diagram shows part of a food web. eagle hawk snake lizard rabbit grasshopper mouse grass carrot plants Which row shows the numbers of different types of consumers present in this food web? primary secondary tertiary quaternary consumers consumers consumers consumers A 2 3 3 1 B 2 2 1 0 C 3 3 1 2 D 3 3 2 1

1 marks

Answer: D

This question in 0653/23 May/June 2023

12 Which food chain is written correctly? A cat  bird  snail  grass B grass  snail  bird  cat C grass  snail  bird  cat D grass  bird  snail  cat

1 marks

Answer: B

This question in 0653/22 Feb/March 2024

13 The diagram shows a food web. python eagle wolf thrush rat dragonfly frog grasshopper fruit fly butterfly corn mangoes flowering lavenders plant How many of the food chains in this food web support the wolf? A 2 B 3 C 4 D 5

1 marks

Answer: D

This question in 0653/21 May/June 2024

13 Which factors reduce the possible number of trophic levels in a food chain? 1 energy lost in faeces 2 energy absorbed by a plant leaf 3 energy released by respiration 4 energy stored in an animal A 1 and 2 B 1 and 3 C 2 and 4 D 3 and 4

1 marks

Answer: B

This question in 0653/21 Oct/Nov 2024

12 Which statement about consumers is correct? A They feed on other organisms to get their energy. B They make their own organic nutrients. C They only get their energy by feeding on producers. D They use energy from sunlight for photosynthesis.

1 marks

Answer: A

This question in 0653/22 Feb/March 2025

13 The diagram shows a food web. eagle fox small bird goat ant caterpillar locust beetle grass wildflower tree Which row states the number of species of each category in this food web? number of primary number of secondary number of tertiary consumer species consumer species consumer species A 6 1 1 B 5 2 1 C 5 2 2 D 3 4 3

1 marks

Answer: B

This question in 0653/22 May/June 2025

12 Which types of consumer describe the cat in this food web? 1 primary consumer 2 secondary consumer 3 tertiary consumer cat thrush robin frog sparrow slug caterpillar plant A 1, 2 and 3 B 1 only C 2 and 3 only D 3 only

1 marks

Answer: C

This question in 0653/23 May/June 2025

11 Which food chain shows the correct feeding levels? A grass grasshopper bluebird snake tertiary secondary primary producer consumer consumer consumer B grass grasshopper bluebird snake primary secondary tertiary producer consumer consumer consumer C grass grasshopper bluebird snake tertiary secondary primary producer consumer consumer consumer D grass grasshopper bluebird snake primary secondary tertiary producer consumer consumer consumer

1 marks

Answer: B

This question in 0653/21 Oct/Nov 2025

13 The diagram shows a food web. red fox owl stoat rabbit deer blackberry plant Which statement about this food web is correct? A There is one producer and two secondary consumers. B There are two producers and three secondary consumers. C There are two secondary consumers and two tertiary consumers. D There are three primary consumers and three secondary consumers.

1 marks

Answer: D

This question in 0653/22 Oct/Nov 2025

12 The diagram shows a food web. dingo cat lizard ant honeyeater eucalyptus tree Which row describes the honeyeater and the cat? honeyeater cat A primary and secondary and secondary consumer tertiary consumer B primary and secondary secondary consumer consumer only C primary tertiary consumer only consumer only D primary secondary and consumer only tertiary consumer

1 marks

Answer: A

This question in 0653/23 Oct/Nov 2025