How does a decomposer digest dead plant material?
It takes the material into its cells and digests it inside them.
It releases enzymes onto the material and absorbs the products.
It surrounds the material and breaks it down using its cell wall.
It releases oxygen onto the material so that it decays faster.
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.