Master Topic B2 of OCR Gateway Science A GCSE Biology (J247): cell division by mitosis and the cell cycle, cell differentiation and specialised cells, stem cells and their uses, diffusion, osmosis and active transport, surface area to volume ratio and exchange surfaces, the human circulatory system, and transport in plants. Worked calculations, required-practical method steps, exam tips and graded model answers for Foundation and Higher tiers.
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