SL / HL
IB Biology
Notes and practice for the 2025 IB Biology syllabus.
- All 40 subtopics of the 2025 syllabus, A1.1–D4.3, in guide order
- Notes for SL and HL, with HL-only content marked
- IB-style practice question PDFs for members
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Simple explanations, organized topics, useful study resources and practice questions.
H₂O
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Biology organized around your syllabus
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NEET Biology
Chapter-focused Biology for the official NEET syllabus.
- NCERT Class XI and XII, chapter by chapter
- Matched to the official NMC NEET (UG) 2026 syllabus
- Chapter-wise MCQs with answer keys
- Full-length NEET sample test papers
Study by topic
Choose IB Biology or NEET Biology first, then open a published theme or unit.
IB syllabus
IB Biology Topics
The four themes of the 2025 IB Biology guide, with the published SL and HL chapters in each theme.
Theme A: Unity and Diversity
Cells, nucleic acids and viruses, organised for the 2025 IB Biology syllabus.
ExploreTheme B: Form and Function
Membranes, digestion, gas exchange, and blood, heart and circulation for IB SL and HL.
ExploreTheme C: Interaction and Interdependence
Nervous control, hormones and how body systems work together in IB Biology.
ExploreTheme D: Continuity and Change
Cell cycle, mitosis, meiosis, and excretion and osmoregulation for IB SL and HL.
Explore
NEET syllabus
NEET Biology Topics
The ten NCERT units for Classes 11 and 12, as they appear on the NEET Biology hub.
Diversity of Living World
The Living World, Biological Classification, Plant Kingdom and Animal Kingdom.
ExploreStructural Organisation
Morphology and anatomy of flowering plants, and structural organisation in animals.
ExploreCell Biology
The unit of life, biomolecules, and cell cycle and cell division.
ExplorePlant Physiology
Photosynthesis in higher plants, respiration in plants, and plant growth and development.
ExploreHuman Physiology
Breathing, circulation, excretion, locomotion, neural control and chemical coordination.
ExploreReproduction
Reproduction in flowering plants, human reproduction and reproductive health.
ExploreGenetics and Evolution
Inheritance, the molecular basis of inheritance, and evolution.
ExploreBiology in Human Welfare
Human health and disease, and microbes in human welfare.
ExploreBiotechnology
Principles and processes, and applications of biotechnology.
ExploreEcology
Organisms and populations, ecosystems, and biodiversity and conservation.
Explore
PDFs
Free Downloads
Question papers and checklists you can download as PDFs.
IB Biology
IB downloads
NEET Biology
NEET downloads
Why Competitors Point
Free IB Biology Notes and NEET Biology MCQs
Competitors Point gives you free IB Biology notes and exam-focused study material written by a biology teacher. Every chapter follows the syllabus, explains each idea in simple language, and uses clear labelled diagrams so you can understand a topic instead of just memorising it.
- Syllabus-aligned
- Simple language
- Labelled diagrams
Notes for IB SL and HL students
Our chapters follow the new 2025 IB syllabus themes, from cell biology, membranes and the cell cycle to genetics, gas exchange, digestion and human physiology. Each chapter ends with IB-style practice questions and a markscheme.
- Cell biology
- Membranes
- Cell cycle
- Genetics
- Gas exchange
- Digestion
- Human physiology
2025Syllabus
SL + HLBoth levels
A–DAll four themes
Chapter-wise practice for NEET
For NEET, every page is matched to the NCERT Class XI and XII chapters in the official NMC NEET (UG) 2026 syllabus, with chapter-wise MCQs and full-length sample test papers.
- Chapter-wise MCQs
- NCERT Class XI & XII
- Sample test papers
2026NEET (UG) syllabus
XI + XIINCERT classes
MCQsChapter-wise
Choose a topic below to start learning, or go straight to the IB hub.