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AQA GCSE Combined Science: Trilogy revision notes

Short notes for every spec point in Combined Science (triple-only content is left out). Pick a topic, then a note.

1

Cell biology

3 subtopics · 14 notes

Cell structure
  1. Subtopic overview: questions, flashcards and PDFs
  2. Eukaryotes and prokaryotes
  3. Animal and plant cells
  4. Required practical 1: using a light microscope
  5. Cell specialisation
  6. Cell differentiation
  7. Microscopy
Cell division
  1. Subtopic overview: questions, flashcards and PDFs
  2. Chromosomes
  3. Mitosis and the cell cycle
  4. Stem cells
Transport in cells
  1. Subtopic overview: questions, flashcards and PDFs
  2. Diffusion
  3. Surface area to volume ratio
  4. Exchange surfaces
  5. Osmosis
  6. Active transport
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2

Organisation

3 subtopics · 27 notes

Principles of organisation
  1. Subtopic overview: questions, flashcards and PDFs
  2. Cells, tissues, organs and organ systems
  3. Size and scale
Animal tissues, organs and organ systems
  1. Subtopic overview: questions, flashcards and PDFs
  2. The digestive system
  3. Enzymes
  4. Amylase, proteases and lipases
  5. Bile
  6. Required practical: food tests
  7. Required practical: the effect of pH on amylase
  8. The heart and the double circulatory system
  9. Controlling the heart rate
  10. The lungs and gas exchange
  11. Blood vessels
  12. Blood
  13. Coronary heart disease
  14. Treating cardiovascular disease
  15. Health and disease
  16. Handling data about disease
  17. Risk factors and causes
  18. The effect of lifestyle on disease
  19. The cost of non-communicable diseases
  20. Using data about risk factors
  21. Cancer
Plant tissues, organs and systems
  1. Subtopic overview: questions, flashcards and PDFs
  2. Plant tissues
  3. The leaf as an organ
  4. Roots, xylem and phloem
  5. Transpiration and stomata
  6. Factors affecting the rate of transpiration
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4

Bioenergetics

2 subtopics · 8 notes

Photosynthesis
  1. Subtopic overview: questions, flashcards and PDFs
  2. The photosynthetic reaction
  3. Factors that affect the rate of photosynthesis
  4. Interacting factors and the inverse square law Higher tier
  5. Required practical: light intensity and the rate of photosynthesis
  6. Uses of glucose from photosynthesis
Respiration
  1. Subtopic overview: questions, flashcards and PDFs
  2. Aerobic and anaerobic respiration
  3. Response to exercise
  4. Metabolism
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5

Homeostasis and response

3 subtopics · 12 notes

Homeostasis
  1. Subtopic overview: questions, flashcards and PDFs
  2. What homeostasis is
  3. Parts of a control system
The human nervous system
  1. Subtopic overview: questions, flashcards and PDFs
  2. Structure and function of the nervous system
  3. Reflex actions and the reflex arc
  4. Required practical: reaction time
Hormonal coordination in humans
  1. Subtopic overview: questions, flashcards and PDFs
  2. The human endocrine system
  3. Control of blood glucose concentration
  4. Type 1 and Type 2 diabetes
  5. Hormones in human reproduction
  6. Contraception
  7. The use of hormones to treat infertility Higher tier
  8. Adrenaline, thyroxine and negative feedback Higher tier
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6

Inheritance, variation and evolution

4 subtopics · 16 notes

Reproduction
  1. Subtopic overview: questions, flashcards and PDFs
  2. Sexual and asexual reproduction
  3. Meiosis
  4. DNA and the genome
  5. Genetic inheritance
  6. Inherited disorders
  7. Sex determination
Variation and evolution
  1. Subtopic overview: questions, flashcards and PDFs
  2. Variation
  3. Evolution
  4. Selective breeding
  5. Genetic engineering
The development of understanding of genetics and evolution
  1. Subtopic overview: questions, flashcards and PDFs
  2. Evidence for evolution
  3. Fossils
  4. Extinction
  5. Resistant bacteria
Classification of living organisms
  1. Subtopic overview: questions, flashcards and PDFs
  2. The Linnaean system and binomial names
  3. Developments in classification
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7

Ecology

3 subtopics · 14 notes

Adaptations, interdependence and competition
  1. Subtopic overview: questions, flashcards and PDFs
  2. Communities
  3. Abiotic factors
  4. Biotic factors
  5. Adaptations
Organisation of an ecosystem
  1. Subtopic overview: questions, flashcards and PDFs
  2. Producers, consumers and food chains
  3. Sampling: distribution and abundance
  4. Predator-prey cycles
  5. How materials are cycled
Biodiversity and the effect of human interaction on ecosystems
  1. Subtopic overview: questions, flashcards and PDFs
  2. Biodiversity
  3. Waste management
  4. Land use
  5. Deforestation
  6. Global warming
  7. Maintaining biodiversity
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