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Cambridge IGCSE · Revision notes

Biology revision notes

Topic by topic notes, worked examples and practice questions for every topic in the Cambridge IGCSE and O Level Biology syllabus.

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Characteristics and classification of living organisms

  1. 1.Living organisms and classificationLife processes, Species and binomial names, Classification groups, Identification keys

Organisation of the organism

  1. 1.Cells and organisationCell structures, Specialised cells, Levels of organisation, Magnification

Movement into and out of cells

  1. 1.Transport across membranesDiffusion, Osmosis, Active transport, Investigating water movement

Biological molecules and enzymes

  1. 1.Molecules and enzymesNutrients and food tests, DNA structure, Enzyme action, Enzyme investigations

Plant nutrition

  1. 1.Photosynthesis and leavesPhotosynthesis equation, Leaf adaptations, Limiting factors, Mineral requirements

Human nutrition

  1. 1.Diet and digestionBalanced diets, Alimentary canal, Digestive enzymes, Absorption and assimilation

Transport in plants

  1. 1.Water and sugar transportXylem and phloem, Transpiration, Water uptake, Translocation

Transport in animals and diseases and immunity

  1. 1.Circulation and defenceHeart and vessels, Blood, Coronary heart disease, Pathogens and immunity

Gas exchange in humans and respiration

  1. 1.Breathing and respirationGas exchange surfaces, Ventilation, Aerobic respiration, Anaerobic respiration

Excretion in humans

  1. 1.Kidneys and excretionMetabolic wastes, Kidney structure, Filtration and reabsorption, Water balance

Coordination and response and drugs

  1. 1.Control and coordinationNervous responses, Sense organs, Hormones and homeostasis, Tropisms and drugs

Reproduction

  1. 1.Reproduction and developmentAsexual and sexual reproduction, Flowering plants, Human reproduction, Pregnancy and contraception

Inheritance and variation and selection

  1. 1.Genes and selectionDNA and protein synthesis, Mitosis and meiosis, Genetic crosses, Variation and evolution

Organisms and their environment, human influences and biotechnology

  1. 1.Ecology and biotechnologyFood webs and populations, Nutrient cycles, Conservation and pollution, Biotechnology and genetic modification

These are Bright Minds revision notes and practice questions in Cambridge style, not official Cambridge International materials. Always check the syllabus year with your school.