IGCSE Biology - 4b Feeding Relationships

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New Edexcel IGCSE 9-1 4BI1 syllabus for 2017 first examined in 2019


Section 4b Feeding relationshsips


  • 4.6 understand the names given to different trophic levels, including producers, primary, secondary and tertiary consumers and decomposers
  • 4.7 understand the concepts of food chains, food webs, pyramids of number, pyramids of biomass and pyramids of energy transfer
  • 4.8 understand the transfer of substances and energy along a food chain
  • 4.9 understand why only about 10% of energy is transferred from one trophic level to the next


New and updated resource for IGCSE 9-1- More practical pages, updated design, concept checker and exam style question for each topic.