A caterpillar eats leaves and absorbs glucose into its body.
A bird then eats the caterpillar.
Why is much of the glucose absorbed by the caterpillar not passed on to the bird?
It is egested in faeces before it is absorbed into cells
It is converted into urea and lost from the body in urine
It is stored as starch in the muscles of the caterpillar
It is used in respiration and lost as carbon dioxide and water
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.