A desert food chain is:
cactus → insect → lizard
The table shows the energy transferred at each stage during one year.
| Stage | Percentage of energy transferred |
|---|---|
| Light energy reaching the cactus to cactus biomass | 1.5% |
| Cactus biomass to insect biomass | 8.0% |
| Insect biomass to lizard biomass | 12.0% |
The energy transferred to the lizard biomass is 4.32 × 103 kJ.
Calculate the light energy that reached the cactus during the year.
Show your working.
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.