Lesson 4.7.2.1

4.7.2.1 Levels of organisation Quiz: AQA Biology, Unit 7

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson 4.7.2.1, Levels of organisation: 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 role do photosynthetic organisms play at the start of food chains?

    • Apex predators
    • Secondary consumers
    • Primary consumers
    • Producers of biomass

  2. Which process do plant producers use to synthesize glucose?

    • Transpiration
    • Combustion
    • Photosynthesis
    • Respiration

  3. Which consumers eat producers?

    • Decomposers
    • Secondary consumers
    • Tertiary consumers
    • Primary consumers

  4. Which technique do ecologists use to sample along a line to show how species are distributed?

    • Titration
    • Distillation
    • Dissection
    • Transects

  5. What does the mode represent in an ecological dataset?

    • Range of values
    • Mean average
    • Middle value
    • Most common value

  6. What is a feeding sequence from producer to top consumer called?

    • A population cycle
    • A biome list
    • A food chain
    • A habitat map

  7. Consumers that kill and eat other animals are called what?

    • Producers
    • Decomposers
    • Prey
    • Predators

  8. How do predator and prey population sizes change in a stable community?

    • Decrease to extinction
    • Remain completely static
    • Rise and fall
    • Increase indefinitely

  9. Daisy counts from five quadrats are 4, 7, 5, 2 and 7. What is the mean?

    • 5
    • 7
    • 4
    • 6

  10. Counts from six quadrats are 3, 8, 3, 6, 9 and 3. What is the mode?

    • 3
    • 5.3
    • 4.5
    • 9

  11. Five values are 12, 4, 9, 15 and 7. What is the median?

    • 9.4
    • 4
    • 15
    • 9

  12. Why do predator numbers peak after prey numbers in a cycle?

    • Predators rely on prey
    • Prey migrate away first
    • Predators hibernate longer
    • Prey reproduce more slowly

  13. In the food chain grass, grasshopper, frog, snake, which organism is a secondary consumer?

    • Grass
    • Grasshopper
    • Frog
    • Snake

  14. Which piece of equipment do ecologists use to sample plant abundance in a field?

    • Quadrat
    • Potometer
    • Transect
    • Pitfall trap

  15. Which graph type is best for showing predator and prey numbers over time?

    • Histogram
    • Pie chart
    • Pictogram
    • Line graph

  16. In the chain algae, snail, fish, heron, which organism is a producer?

    • Fish
    • Heron
    • Snail
    • Algae

  17. What happens to predator numbers shortly after prey numbers increase?

    • They become extinct
    • They decrease
    • They stay constant
    • They increase

  18. Quadrat counts are 2, 5, 3, 8, 4 and 6. What is the mean?

    • 4.7
    • 4.5
    • 5.0
    • 4.0

  19. Which piece of equipment is used to investigate changes in organism distribution along a line?

    • Quadrat frame
    • Transect line
    • Sweep net
    • Pitfall trap

  20. Why do ecologists place multiple quadrats randomly across an area?

    • Save time
    • Representative data
    • Find the largest species
    • Eliminate all errors

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