IGCSE Biology - 4a The organism in the environment

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


Section 4a The organism in the environment


  • 4.1 understand the terms population, community, habitat and ecosystem
  • 4.2 practical: investigate the population size of an organism in two different areas using quadrats
  • 4.3B understand the term biodiversity
  • 4.4B practical: investigate the distribution of organisms in their habitats and measure biodiversity using quadrats
  • 4.5 understand how abiotic and biotic factors affect the population size and distribution oforganisms


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