A pyramid of biomass is drawn accurately to scale. The bar for trophic level 2 is one tenth of the width of the bar for trophic level 1. The same efficiency of transfer applies at every step. Which statement about the bar for trophic level 3 is correct?
It is one hundredth of the width of the bar for trophic level 2.
It is one twentieth of the width of the bar for trophic level 1.
It is the same width as the bar for trophic level 2.
It is one tenth of the width of the bar for trophic level 2.
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.