Free Biology Notes for Students
Complete Biology Toolkit in One Place
Biology Notes Online provides free study notes, lecture videos and microscopic images covering microbiology, botany, zoology, biochemistry, genetics, cell biology and laboratory methods for A-level, AP, IB, BSc and MSc students.
All Biology Topics
Explore Every Branch of Biology – Dive Deep, Scroll Wide, Learn Fast
- Agricultural Microbiology 12 posts
- Bacteriology 99 posts
- Basic Microbiology 97 posts
- Biochemistry 102 posts
- Bioinformatics 25 posts
- Biotechnology 11 posts
- Cell Biology 127 posts
- Environmental Microbiology 105 posts
- Food Microbiology 55 posts
- Genetics 99 posts
- Immunology 102 posts
- Industrial microbiology 24 posts
- Intellectual Property Rights 9 posts
- Medical Microbiology 46 posts
- Microscope 28 posts
- Molecular biology 85 posts
- Mycology 48 posts
- Parasitology 32 posts
- Phycology 25 posts
- Prions 2 posts
- Protozoa 15 posts
- Virology 64 posts
- Angiosperms 31 posts
- Archegoniate 12 posts
- Biodiversity 1 post
- Economic Botany 14 posts
- Ethnobotany 5 posts
- Horticultural 10 posts
- Natural Resource Management 3 posts
- Plant Anatomy and Embryology 20 posts
- Plant Breeding 16 posts
- Plant Ecology and Taxonomy 15 posts
- Plant Physiology and Metabolism 18 posts
- Animal Behaviour 1 post
- Basic Zoology 6 posts
- Biology of Insecta 15 posts
- Chordates 27 posts
- Developmental Biology 20 posts
- Endocrinology 17 posts
- Ethology 6 posts
- Evolutionary Biology 21 posts
- Fish and fisheries 25 posts
- Human Anatomy 16 posts
- Neuroscience 17 posts
- Non-chordates 20 posts
- Pest Management 4 posts
- Physiology 52 posts
- Protista 15 posts
- Reproductive Biology 5 posts
- Research Methodology 6 posts
- Vertebrata 13 posts
- Biochemical Test 88 posts
- Botany Practicals 2 posts
- Culture Media 79 posts
- Cytopathology 1 post
- Hematology 7 posts
- Immunology Practical 19 posts
- Instruments 151 posts
- Laboratory Techniques 5 posts
- Laboratory Tests 14 posts
- Microbiology Techniques 26 posts
- Protocols 18 posts
- Staining 43 posts
- Under Microscope 26 posts
- Differences 171 notes
- Intellectual Property Rights 9 notes
- Research Methodology 6 notes
- Syllabus 14 notes
- Bacteriology 99 posts
- Mycology 48 posts
- Parasitology 32 posts
- Phycology 25 posts
- Prions 2 posts
- Protozoa 15 posts
- Virology 64 posts
Latest Notes
DNA vs RNA – Key Differences and Similarities
involved in transmitting the genetic code needed for protein synthesis. Certain viruses also use DNA as their material for genetics.
-
Epidemic – Definition, Causes, Types, Examples
An epidemic is a rise in disease cases above expected levels in a population. Learn its causes, types, examples, and differences from endemic and…
-
Endemic – Meaning, Types, Examples, and Differences From Epidemic and Pandemic
Endemic means regularly present in a particular place or population. See disease examples, its biology meaning, and how it differs from epidemic and pandemic.
-
Pandemic: Definition, Spread, Examples, and Prevention
Learn what a pandemic is, how it differs from an epidemic, how pandemics emerge and spread, major historical examples, and how future risk is…
-
Kidney – Anatomy, Functions, Nephrons & Urine Formation
Explore kidney anatomy, location, nephron structure, blood flow, urine formation, and the functions that regulate fluids, electrolytes, pH, and blood pressure.
-
Epidemiology: Definition, Principles, Methods, Measures, and Uses
Epidemiology explained with its definition, core principles, types, study designs, key measures, applications, examples, and public health importance.
-
Extinction – Definition, Types, Causes & Examples
Extinction is a biological condition in which a species is completely lost, with no living individual of that species remaining anywhere in the world.…
-
Giardiasis – Cause, Life Cycle, Symptoms, Diagnosis, Treatment, and Prevention
Learn what causes giardiasis, how Giardia spreads and affects the intestine, its symptoms, diagnosis, treatment, recovery, complications, and prevention.
Homologous Chromosomes vs Sister Chromatids – Key Differences
Homologous chromosomes and sister chromatids are two different chromosome relationships found during the cell cycle. Homologous chromosomes occur as pairs in a diploid cell.…
-
Japanese Encephalitis Virus (JEV): Structure, Transmission, Symptoms & Prevention
Learn what Japanese encephalitis virus (JEV) is, its structure and replication, how mosquitoes transmit it, and how JE is diagnosed, treated, and prevented.
Discover the Microscopic World
Share and explore stunning microscopic images of microorganisms in our growing community.
Sourav Pan 
