Biology
📚 Master key facts, important dates, historical events, geographical features, and scientific discoveries that are crucial for competitive exams.
Important Facts
Study MaterialImportant Facts – Biology
Biology Important Facts help candidates quickly revise important concepts, diseases, vitamins, human body systems, plants, animals, genetics, ecology, and biotechnology frequently asked in competitive examinations.
These facts are highly useful for UPSC, SSC, Banking, Railway, Defence, State PSC, CDS, NDA, Insurance, and various government examinations.
Basic Biology Facts
- Biology is the study of → Living organisms
- Father of Biology → Aristotle
- Father of Genetics → Gregor Mendel
- Cell discovered by → Robert Hooke
- Powerhouse of cell → Mitochondria
- Control center of cell → Nucleus
- Largest organ in human body → Skin
- Largest gland in human body → Liver
- Smallest bone in human body → Stapes
- Largest bone in human body → Femur
Branches of Biology
| Branch | Study Area |
|---|---|
| Botany | Plants |
| Zoology | Animals |
| Microbiology | Microorganisms |
| Genetics | Heredity |
| Ecology | Environment |
| Biotechnology | Biological Technology |
Cell Biology Important Facts
- Cell is the → Basic unit of life
- Largest cell → Ostrich egg
- Smallest cell → Mycoplasma
- Plant cells contain → Cell wall
- Chloroplast contains → Chlorophyll
- Ribosomes help in → Protein synthesis
- DNA found mainly in → Nucleus
- Mitochondria produce → Energy
Human Body Important Facts
| Organ | Main Function |
|---|---|
| Heart | Pumps Blood |
| Lungs | Breathing |
| Brain | Control & Coordination |
| Kidney | Removes Waste |
| Liver | Produces Bile Juice |
| Stomach | Digestion of Food |
Blood & Circulatory System Facts
- Normal human body temperature → 37°C
- Normal blood pressure → 120/80 mmHg
- Red blood cells contain → Hemoglobin
- White blood cells protect against → Diseases
- Blood group discovered by → Karl Landsteiner
- Universal donor blood group → O Negative
- Universal recipient blood group → AB Positive
- Human heart has → Four chambers
Nutrition & Vitamins Facts
| Vitamin | Deficiency Disease |
|---|---|
| Vitamin A | Night Blindness |
| Vitamin B1 | Beri-Beri |
| Vitamin C | Scurvy |
| Vitamin D | Rickets |
| Vitamin E | Muscle Weakness |
| Vitamin K | Blood Clotting Problem |
Diseases & Causes Facts
- Malaria caused by → Plasmodium
- Tuberculosis caused by → Bacteria
- Dengue caused by → Virus
- AIDS caused by → HIV Virus
- Typhoid caused by → Salmonella bacteria
- Cholera caused by → Bacteria
- COVID-19 caused by → Coronavirus
- Rabies spreads through → Animal bite
Plants & Photosynthesis Facts
| Fact | Information |
|---|---|
| Photosynthesis occurs in | Green plants |
| Green pigment in plants | Chlorophyll |
| Plants absorb | Carbon dioxide |
| Plants release | Oxygen |
| Roots absorb | Water & Minerals |
| Stomata help in | Gas Exchange |
Genetics & Heredity Facts
- Father of Genetics → Gregor Mendel
- Gene is the → Unit of heredity
- DNA is the → Genetic material
- Human chromosome number → 46
- RNA helps in → Protein synthesis
- Chromosomes carry → Genes
- Heredity passes traits from → Parents to offspring
- Genetics studies → Inheritance
Microorganisms Important Facts
| Microorganism | Use / Effect |
|---|---|
| Bacteria | Cause diseases & fermentation |
| Virus | Cause infectious diseases |
| Fungi | Decomposition |
| Algae | Photosynthesis |
| Lactobacillus | Curd formation |
Ecology & Environment Facts
- Ecosystem includes → Living & non-living things
- Ozone layer protects from → UV rays
- Deforestation reduces → Biodiversity
- Global warming caused by → Greenhouse gases
- Food chain shows → Flow of energy
- Producers in ecosystem → Green plants
- Consumers depend on → Other organisms
- Decomposers break down → Dead organisms
Biotechnology Important Facts
- Biotechnology uses → Living organisms for useful products
- Vaccines protect against → Diseases
- Tissue culture helps in → Plant growth
- DNA fingerprinting used in → Forensic science
- Genetic engineering improves → Crop quality
- Stem cell research supports → Medical treatment
- Cloning creates → Genetically identical organisms
- Biotechnology used in → Medicine & Agriculture
Scientific Names Important Facts
| Common Name | Scientific Name |
|---|---|
| Human | Homo sapiens |
| Mango | Mangifera indica |
| Rice | Oryza sativa |
| Wheat | Triticum aestivum |
| Tiger | Panthera tigris |
| Lion | Panthera leo |
Most Important Topics Asked in Exams
- Human Body Systems
- Diseases & Vaccines
- Nutrition & Vitamins
- Cells & Tissues
- Plants & Photosynthesis
- Genetics & DNA
- Ecology & Environment
- Biotechnology
- Scientific Names
- Microorganisms
Quick Revision Framework
Learn Basic Biology Concepts
↓
Understand Human Body Systems
↓
Study Diseases & Nutrition
↓
Revise Genetics & Environment
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Practice MCQs Daily
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Boost GK Preparation
Final Takeaway
Biology Important Facts cover human body systems, diseases, vitamins, genetics, plants, ecology, and biotechnology frequently asked in competitive examinations.
Regular revision of biology facts improves General Science knowledge, conceptual understanding, and competitive examination performance significantly.