IGCSE Biology - 4b Feeding Relationships
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.