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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.

2

Organisation

3 subtopics · 27 notes

Principles of organisation
  1. Cells, tissues, organs and organ systems
  2. Size and scale
Animal tissues, organs and organ systems
  1. The digestive system
  2. Enzymes
  3. Amylase, proteases and lipases
  4. Bile
  5. Required practical: food tests
  6. Required practical: the effect of pH on amylase
  7. The heart and the double circulatory system
  8. Controlling the heart rate
  9. The lungs and gas exchange
  10. Blood vessels
  11. Blood
  12. Coronary heart disease
  13. Treating cardiovascular disease
  14. Health and disease
  15. Handling data about disease
  16. Risk factors and causes
  17. The effect of lifestyle on disease
  18. The cost of non-communicable diseases
  19. Using data about risk factors
  20. Cancer
Plant tissues, organs and systems
  1. Plant tissues
  2. The leaf as an organ
  3. Roots, xylem and phloem
  4. Transpiration and stomata
  5. Factors affecting the rate of transpiration
All organisation notes (PDF)23 pages
5

Homeostasis and response

3 subtopics · 12 notes

Homeostasis
  1. What homeostasis is
  2. Parts of a control system
The human nervous system
  1. Structure and function of the nervous system
  2. Reflex actions and the reflex arc
  3. Required practical: reaction time
Hormonal coordination in humans
  1. The human endocrine system
  2. Control of blood glucose concentration
  3. Type 1 and Type 2 diabetes
  4. Hormones in human reproduction
  5. Contraception
  6. The use of hormones to treat infertility Higher tier
  7. Adrenaline, thyroxine and negative feedback Higher tier
All homeostasis and response notes (PDF)24 pages
6

Inheritance, variation and evolution

4 subtopics · 16 notes

Reproduction
  1. Sexual and asexual reproduction
  2. Meiosis
  3. DNA and the genome
  4. Genetic inheritance
  5. Inherited disorders
  6. Sex determination
Variation and evolution
  1. Variation
  2. Evolution
  3. Selective breeding
  4. Genetic engineering
The development of understanding of genetics and evolution
  1. Evidence for evolution
  2. Fossils
  3. Extinction
  4. Resistant bacteria
Classification of living organisms
  1. The Linnaean system and binomial names
  2. Developments in classification
All inheritance, variation and evolution notes (PDF)23 pages