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7.4 Trophic levels in an ecosystem

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Question 12

In a river, algae are eaten by mayfly nymphs. Trout feed on the mayfly nymphs, and otters eat the trout.

a.

Name the organism at trophic level 1.

[1]
b.

Name the organism at trophic level 2.

[1]
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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