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Science (Double Award) — Biology

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Science (Double Award) — Biology

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Home/Edexcel/IGCSE/Science (Double Award) — Biology/Revision Notes

Edexcel IGCSE Science (Double Award) — Biology Revision Notes

Choose a topic to read concise revision notes — 110 notes across 21 subtopics, with examiner tips and worked examples.

1. The nature and variety of living organisms

· 4 notes

1Characteristics of living organisms1 note Start guided lesson
2Variety of living organisms3 notes

2. Structure and functions in living organisms

· 54 notes

1Level of organisation1 note Start guided lesson
2Cell structure2 notes
- Animal & Plant Cells: Similarities & Differences Start guided lesson
- Cell Structures Start guided lesson
3Biological molecules6 notes
4Movement of substances into and out of cells3 notes
5Nutrition11 notes
6Respiration3 notes
7Gas exchange5 notes
8Transport9 notes
9Excretion2 notes
- Excretion in Humans Start guided lesson
- Excretion in Plants Start guided lesson
10Co-ordination and response12 notes

3. Reproduction and inheritance

· 27 notes

1Reproduction12 notes
2Inheritance15 notes

4. Ecology and the environment

· 11 notes

1The organism in the environment3 notes
2Feeding relationships3 notes
3Cycles within ecosystems1 note Start guided lesson
4Human influences on the environment4 notes

5. Use of biological resources

· 14 notes

1Food production8 notes
2Selective breeding2 notes
- Selective Breeding in Animals Start guided lesson
- Selective Breeding in Plants Start guided lesson
3Genetic modification (genetic engineering)4 notes