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 96 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
- 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 7 posts
- Vertebrata 13 posts
- Biochemical Test 88 posts
- Botany Practicals 2 posts
- Culture Media 78 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
- Research Methodology 7 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
CRISPR-Cas9: Definition, Classification, Structure, Mechanism, Applications, and Limitations
CRISPR-Cas9 explained: meaning, components, mechanism, applications, limitations, history, ethics, and current uses in genome editing and medicine.
-
Bacterial Conjugation – Definition, Steps, Importance Examples
What is Bacterial Conjugation? Bacterial Conjugation Definition Bacterial conjugation is a process of genetic exchange where DNA is transferred from a donor cell to…
-
Plasmids: Structure, Types, Functions and Applications
Learn what plasmids are, how they are structured and replicated, their major types and functions, and how plasmids are used in genetics and biotechnology.
-
Plasmid Replication – Mechanism With Diagram
What are plasmids? Copy Number and Physical Nature of Plasmids Properties of Plasmids Plasmid Replication Mechanism 1. Rolling circle Mode of Replication Rolling-Circle Replication…
-
Controlled Experiment – Definition, Process, Importance, Examples
A controlled experiment tests whether a deliberate change affects an outcome while other relevant influences are kept as comparable as possible. By comparing experimental…
-
Endemism – Definition, Characters, Theories, Types, Factors, Examples
What is Endemism? Endemism Definition Endemism is the condition where a species is native to and restricted to a specific geographic area, such as…
-
Developmental Biology- Definition, Key Concepts, Stages, Scope and Applications
Developmental biology is a branch of biology that studies how an organism develops and changes through its life, including the embryonic and other developmental…
-
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.
Discover the Microscopic World
Share and explore stunning microscopic images of microorganisms in our growing community.
Sourav Pan 
