Spec 1BI0
Revise Edexcel GCSE Biology 9.2.1 Energy transfer between trophic levels with the question bank, lessons, revision guides, and flashcards.
Explain how some energy is transferred to less useful forms at each trophic level and that this affects the number of organisms at each trophic level, limits the length of a food chain and determines the shape of a pyramid of biomass in an ecosystem
