Lesson 4.7.1.1

4.7.1.1 Communities Quiz: AQA Biology, Unit 7

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson 4.7.1.1, Communities: 20 multiple choice questions for the AQA GCSE Biology (8461), Unit 7: Ecology, written with Revision Ninja.

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The 20 questions

  1. What term describes a community interacting with its non-living environment?

    • Population
    • Biosphere
    • Ecosystem
    • Habitat

  2. What term describes species in a community depending on each other for survival?

    • Adaptation
    • Competition
    • Interdependence
    • Mutualism

  3. What four non-living resources do plants typically compete for?

    • Nitrogen and starch
    • Carbon and proteins
    • Light and water
    • Oxygen and glucose

  4. Which three resources do animals in a community compete for?

    • Light, space, water
    • Food, mates, territory
    • Water, minerals, territory
    • Light, mates, space

  5. What happens to population sizes in a stable community?

    • Remain constant
    • Fluctuate wildly
    • Decrease steadily
    • Increase rapidly

  6. Which list shows levels of organisation in an ecosystem from smallest to largest?

    • Ecosystem, community, organism
    • Organism, population, community
    • Community, population, organism
    • Population, organism, ecosystem

  7. What key feature of a community means removing one species affects many others?

    • Eutrophication
    • Interdependence
    • Extinction
    • Bioaccumulation

  8. What term describes all the populations of different species living in one habitat?

    • Population
    • Community
    • Biosphere
    • Ecosystem

  9. Two fish species in a lake both feed on the same insect species. What is this interaction?

    • Predation
    • Mutualism
    • Parasitism
    • Competition

  10. A tall plant grows over a smaller clover plant, shading it. What resource is limited?

    • Mineral ions
    • Carbon dioxide
    • Water
    • Light

  11. If a disease reduces the rabbit population, what immediately happens to the fox population?

    • It increases
    • It doubles
    • It decreases
    • It remains unchanged

  12. Snails eat algae, and fish eat snails. If snails die out, what happens to algae levels?

    • They decrease
    • They increase
    • They disappear completely
    • They remain unchanged

  13. Two bird species in the same woodland eat the same type of seeds. What resource causes competition?

    • Territory
    • Mates
    • Light
    • Food

  14. A student's pond survey finds sunlight, soil mineral content and grazing animals. Which of these is biotic?

    • Grazing animals
    • Sunlight
    • Soil mineral content
    • Air temperature

  15. Which resource is competed for by animals of the same species but NOT by plants?

    • Space
    • Light
    • Water
    • Mates

  16. What concept describes species depending on each other for food, shelter, and pollination?

    • Competition
    • Interdependence
    • Biodiversity
    • Adaptation

  17. An introduced predator eats both target pests and pollinators. What ecological concept does this demonstrate?

    • Bioaccumulation
    • Eutrophication
    • Extinction
    • Interdependence

  18. Plant species B absorbs most soil water, leaving little for plant species A. Why does species A decline?

    • Lack of light
    • Lack of water
    • Lack of mates
    • Lack of space

  19. A decrease in oxygen levels in a lake is what type of factor?

    • Biotic
    • Symbiotic
    • Abiotic
    • Trophic

  20. In a rocky shore community, barnacles and limpets compete for space on the rock. What resource is being competed for?

    • Light intensity
    • Space
    • Carbon dioxide
    • Mates

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