A rabbit eats 200 g of grass. Only 20 g of this biomass is used to make new rabbit tissue.
Explain why most of the biomass eaten by the rabbit is not used to make new tissue.
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Markscheme
7.4 Trophic levels in an ecosystem Questions
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.