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7.4 Trophic levels in an ecosystem

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Question 21

In a garden, a hawthorn plant is eaten by an aphid. The aphid is eaten by a ladybird, and the ladybird is eaten by a robin.

a.

Name the producer in this food chain.

[1]
b.

The organisms are listed below in feeding order.

  • hawthorn plant: trophic level 1
  • aphid: trophic level ___
  • ladybird: trophic level 3
  • robin: trophic level ___

Complete the list by writing the two missing trophic-level numbers.

[2]
Markscheme

7.4 Trophic levels in an ecosystem Questions

  1. GCSE
  2. /Biology
  3. /7.4 Trophic levels in an ecosystem

103 exam-style questions on AQA GCSE Biology 7.4 Trophic levels in an ecosystem, covering 7.4.1 Trophic levels, 7.4.2 Pyramids of biomass, and 7.4.3 Transfer of biomass. Each one has a worked solution and a mark scheme showing where the marks go.

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