A terrestrial food chain in a temperate garden ecosystem is represented below:
Dandelion→Snail→Song thrush \text{Dandelion} \rightarrow \text{Snail} \rightarrow \text{Song thrush} Dandelion→Snail→Song thrushState the ultimate source of energy for the dandelion in this food chain.
From the list below, identify all the appropriate terms that describe the feeding relationship and ecological role of each of the three organisms in this food chain:
During the consumption of the snail by the song thrush, approximately 90% of the biomass is not transferred to the next trophic level. State two pathways or reasons for this loss of biomass between these two trophic levels.
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.