Researchers study voles living in the same habitat. Winter air temperatures are lower than summer air temperatures, but the voles maintain the same body temperature. The efficiency of biomass transfer from their seed food into new vole tissue is lower in winter.
Which statement explains this?
A greater proportion of absorbed biomass is used in respiration by the voles in winter
A greater proportion of seed biomass is left uneaten by the voles in winter
A greater proportion of absorbed biomass is excreted as urea by the voles in winter
A greater proportion of eaten biomass is egested as faeces by the voles in winter
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.