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7.4 Trophic levels in an ecosystem

7.4 Trophic levels in an ecosystem

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Question 21
H

Producers transfer only about 1% of the light energy that reaches them into new biomass.

a.

Suggest two reasons why this percentage is so low.

[2]
b.

Explain why this low percentage is important for every organism in the food chain.

[1]
Markscheme

7.4 Trophic levels in an ecosystem Questions

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

61 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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