GCSE Combined Science Biology topics
44 Biology topics for GCSE Combined Science. Each page explains the idea, works through examples, lists the common mistakes and gives practice questions with answers.
Yumio is not affiliated with, endorsed by or connected to AQA, Pearson Edexcel or any other exam board.
Grades 1 to 4
Grade 3 Cell structure and specialised cells
Foundation and HigherGrade 4 Blood
Foundation and HigherGrade 4 Chromosomes, mitosis and the cell cycle
Foundation and HigherGrade 4 Communities, adaptations and interdependence
Foundation and HigherGrade 4 Diffusion and exchange surfaces
Foundation and HigherGrade 4 Homeostasis, the nervous system and reflexes
Foundation and HigherGrade 4 Maths skills for biology
Foundation and HigherGrade 4 Microscopes and magnification
Foundation and HigherGrade 4 Pathogens and communicable disease
Foundation and HigherGrade 4 The digestive system and food tests
Foundation and Higher
Foundation and HigherGrade 4 Blood
Foundation and HigherGrade 4 Chromosomes, mitosis and the cell cycle
Foundation and HigherGrade 4 Communities, adaptations and interdependence
Foundation and HigherGrade 4 Diffusion and exchange surfaces
Foundation and HigherGrade 4 Homeostasis, the nervous system and reflexes
Foundation and HigherGrade 4 Maths skills for biology
Foundation and HigherGrade 4 Microscopes and magnification
Foundation and HigherGrade 4 Pathogens and communicable disease
Foundation and HigherGrade 4 The digestive system and food tests
Foundation and Higher
Grades 5 and 6
Grade 5 Active transport
Foundation and HigherGrade 5 Biodiversity and human impact on the environment
Foundation and HigherGrade 5 Classification and evolutionary trees
Foundation and HigherGrade 5 Decay, the carbon cycle and the water cycle
Foundation and HigherGrade 5 Defence against disease and vaccination
Foundation and HigherGrade 5 Enzymes
Foundation and HigherGrade 5 Exchange surfaces and gas exchange in the lungs
Foundation and HigherGrade 5 Fieldwork: quadrats, transects and population estimates
Foundation and HigherGrade 5 Food chains, trophic levels and biomass transfer
Foundation and HigherGrade 5 Growth, differentiation and percentile charts
Foundation and HigherGrade 5 Health, disease and risk factors
Foundation and HigherGrade 5 Osmosis
Foundation and HigherGrade 5 Parasites, mutualism and the nitrogen cycle
Foundation and HigherGrade 5 Photosynthesis and limiting factors
Foundation and HigherGrade 5 Plant disease and plant defences
Foundation and HigherGrade 5 Plant tissues, organs and translocation
Foundation and HigherGrade 5 Required practicals and working scientifically in biology
Foundation and HigherGrade 5 Respiration, exercise and metabolism
Foundation and HigherGrade 5 Sexual and asexual reproduction and meiosis
Foundation and HigherGrade 5 Stem cells and differentiation
Foundation and HigherGrade 5 The heart and blood vessels
Foundation and HigherGrade 6 Antibiotics, painkillers and drug testing
Foundation and HigherGrade 6 Evidence for human evolution
Foundation and HigherGrade 6 Hormones and blood glucose control
Foundation and HigherGrade 6 Inheritance: genetic crosses, sex and inherited disorders
Foundation and HigherGrade 6 Plant hormones and tropisms
Foundation and HigherGrade 6 Puberty, the menstrual cycle and contraception
Foundation and HigherGrade 6 Selective breeding and genetic engineering
Foundation and HigherGrade 6 The brain and the eye
Foundation and HigherGrade 6 Transpiration and stomata
Foundation and HigherGrade 6 Variation, natural selection and evidence for evolution
Foundation and HigherGrade 6 Water balance, kidneys and temperature control
Foundation and Higher
Foundation and HigherGrade 5 Biodiversity and human impact on the environment
Foundation and HigherGrade 5 Classification and evolutionary trees
Foundation and HigherGrade 5 Decay, the carbon cycle and the water cycle
Foundation and HigherGrade 5 Defence against disease and vaccination
Foundation and HigherGrade 5 Enzymes
Foundation and HigherGrade 5 Exchange surfaces and gas exchange in the lungs
Foundation and HigherGrade 5 Fieldwork: quadrats, transects and population estimates
Foundation and HigherGrade 5 Food chains, trophic levels and biomass transfer
Foundation and HigherGrade 5 Growth, differentiation and percentile charts
Foundation and HigherGrade 5 Health, disease and risk factors
Foundation and HigherGrade 5 Osmosis
Foundation and HigherGrade 5 Parasites, mutualism and the nitrogen cycle
Foundation and HigherGrade 5 Photosynthesis and limiting factors
Foundation and HigherGrade 5 Plant disease and plant defences
Foundation and HigherGrade 5 Plant tissues, organs and translocation
Foundation and HigherGrade 5 Required practicals and working scientifically in biology
Foundation and HigherGrade 5 Respiration, exercise and metabolism
Foundation and HigherGrade 5 Sexual and asexual reproduction and meiosis
Foundation and HigherGrade 5 Stem cells and differentiation
Foundation and HigherGrade 5 The heart and blood vessels
Foundation and HigherGrade 6 Antibiotics, painkillers and drug testing
Foundation and HigherGrade 6 Evidence for human evolution
Foundation and HigherGrade 6 Hormones and blood glucose control
Foundation and HigherGrade 6 Inheritance: genetic crosses, sex and inherited disorders
Foundation and HigherGrade 6 Plant hormones and tropisms
Foundation and HigherGrade 6 Puberty, the menstrual cycle and contraception
Foundation and HigherGrade 6 Selective breeding and genetic engineering
Foundation and HigherGrade 6 The brain and the eye
Foundation and HigherGrade 6 Transpiration and stomata
Foundation and HigherGrade 6 Variation, natural selection and evidence for evolution
Foundation and HigherGrade 6 Water balance, kidneys and temperature control
Foundation and Higher
Grades 7 to 9
Grade 7 DNA, the genome and mutations
Foundation and HigherGrade 7 Monoclonal antibodies
Higher tier content
Foundation and HigherGrade 7 Monoclonal antibodies
Higher tier content
Sitting a paper soon? Read how the papers are set: AQA or Edexcel.
Also: Biology key terms · how to revise Biology · practice questions