Light energy of 2.0 × 106 kJ reaches a field.
The producers transfer about 1% of this energy to their biomass.
The primary consumers receive 10% of the energy in the producer biomass.
How much energy is transferred to the primary consumers?
2.0×1022.0 \times 10^22.0×102 kJ
2.0×1032.0 \times 10^32.0×103 kJ
2.0×1042.0 \times 10^42.0×104 kJ
2.0×1052.0 \times 10^52.0×105 kJ
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.