An ecosystem stores 80000 kJ in new producer biomass each year. At each feeding stage, 10% is transferred into new consumer biomass. A predator population needs at least 50 kJ in new biomass each year to persist.
What is the greatest number of transfers from the producers that could supply this population?
one transfer
two transfers
four transfers
three transfers
38 exam-style questions on Edexcel GCSE Biology 9.2 Energy transfer and biodiversity, covering 9.2.1 Energy transfer between trophic levels, 9.2.2 Efficiency of energy transfers, 9.2.3 Human interactions and biodiversity, 9.2.4 Benefits of maintaining biodiversity, and 9.2.5 Biological factors affecting food security. Each one has a worked solution and a mark scheme showing where the marks go.