A student draws a pyramid of biomass to scale. The bar for the producers is 15 cm wide.
The biomass of the primary consumers is 6% of the biomass of the producers.
The biomass of the secondary consumers is 110\displaystyle \frac{1}{10}101 of the biomass of the primary consumers.
How wide should the student draw the bar for the secondary consumers?
0.9 mm
1.5 mm
9 mm
90 mm
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.