IB Biology (first exams 2025) notes for Theme D, by syllabus code.
Cell division IB Biology notes for D2.1 (SL and AHL): interphase, mitosis, cytokinesis, meiosis, non-disjunction, cyclins and checkpoints, cancer and the mitotic index, with diagrams, a root tip practical, common doubts and practice questions.
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Home › IB Biology › Excretion and Osmoregulation Excretion and Osmoregulation These notes on excretion and osmoregulation IB Biology cover the human excretory system: nitrogenous wastes, the kidney and nephron, ultrafiltration and urine formation, the loop of Henle, ADH and water reabsorption, plus dialysis when kidneys fail. These notes follow D3.3 Homeostasis in the IB
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