Science & Technology
Space, biotech, defence and emerging tech.
- Chapter 1 of 27
The Living World: Classification and Taxonomic Aids
Growth alone doesn't prove something is alive since crystals grow too, and a herbarium sheet, a flora and a monograph are three genuinely different taxonomic aids, not synonyms.
4 min readNCERT (Biology) · The Living World - Chapter 2 of 27
Viruses, Viroids and Prions
Why viruses, viroids and prions sit outside Whittaker's five kingdoms, and what actually separates a lytic bacteriophage cycle from a lysogenic one.
12 min readNCERT (Biology) · Viruses - Chapter 3 of 27
Plant Kingdom and Physiology
NCERT's plant kingdom: algae to angiosperms, lichens as pollution indicators, xerophyte survival tactics, and how plant diseases actually spread.
15 min readNCERT (Biology) · Plant Kingdom: Bryophytes and Lichens - Chapter 4 of 27
Animal Reproduction and Feeding Habits
Oviparous, viviparous and parthenogenetic reproduction, plus herbivore, carnivore and filter-feeding adaptations, with real named animal examples.
11 min readNCERT (Biology) · Animal Diversity, Reproduction and Feeding Habits - Chapter 5 of 27
Morphology of Flowering Plants
A racemose inflorescence keeps growing indefinitely because its tip never becomes a flower, while a cymose one stops growing the moment its own tip does exactly that.
4 min readNCERT (Biology) · Morphology of Flowering Plants - Chapter 6 of 27
Anatomy of Flowering Plants
A dicot stem can keep growing thicker every year because it kept its cambium; a monocot's vascular bundles closed that door permanently the moment they formed.
4 min readNCERT (Biology) · Anatomy of Flowering Plants - Chapter 7 of 27
Structural Organisation in Animals: The Four Tissue Types
Cardiac muscle is striated like skeletal muscle but involuntary like smooth muscle, sitting deliberately between the other two types rather than belonging cleanly to either.
4 min readNCERT (Biology) · Structural Organisation in Animals - Chapter 8 of 27
Cell Biology, Molecular Genetics and Evolution
NCERT's foundational biology story: the cell as the basic unit of life, the double helix, and the hominin timeline from Dryopithecus to Homo sapiens.
17 min readNCERT (Biology) · Cell: The Unit of Life; Molecular Basis of Inheritance; Evolution - Chapter 9 of 27
Biomolecules: Macromolecules and Enzymes
An enzyme's active site is not a rigid lock waiting for the right key, it actively reshapes itself around the substrate, and that reshaping is what actually speeds up the reaction.
4 min readNCERT (Biology) · Biomolecules - Chapter 10 of 27
The Cell Cycle, Mitosis and Meiosis
Mitosis makes two identical copies for growth and repair, meiosis makes four genetically shuffled halves for reproduction, and confusing which one produces variation is the standard exam trap.
4 min readNCERT (Biology) · Cell Cycle and Cell Division - Chapter 11 of 27
Photosynthesis in Higher Plants
The same enzyme that fixes carbon dioxide can also waste energy by grabbing oxygen instead, and Kranz anatomy exists specifically to stop it from ever getting the chance.
3 min readNCERT (Biology) · Photosynthesis in Higher Plants - Chapter 12 of 27
Respiration in Plants
Glycolysis happens the same way whether oxygen is present or not, and it's only what happens to its two pyruvate molecules afterward that decides whether a cell nets 2 ATP or 36.
3 min readNCERT (Biology) · Respiration in Plants - Chapter 13 of 27
Plant Growth and Development: Hormones and Flowering
A disease Japanese farmers called 'foolish seedling' led straight to the discovery of gibberellin, and coconut milk is still the standard natural source of a growth hormone found by pure accident.
4 min readNCERT (Biology) · Plant Growth and Development - Chapter 14 of 27
Breathing and Exchange of Gases
A normal breath moves only about 500 ml of air, a small fraction of what the lungs can actually hold, and most of the carbon dioxide you exhale never travelled as a dissolved gas at all.
3 min readNCERT (Biology) · Breathing and Exchange of Gases - Chapter 15 of 27
Blood, Lymph and the Circulatory System
Blood's plasma and formed elements, the ABO and Rh systems, lymph, the heart's chambers and valves, the cardiac cycle, and double circulation.
15 min readNCERT (Biology) · Circulatory System - Chapter 16 of 27
Excretory Products and their Elimination
A falling glomerular filtration rate triggers a hormone cascade that ends in a vasoconstrictor powerful enough to raise blood pressure specifically to push that filtration rate back up.
4 min readNCERT (Biology) · Excretory Products and their Elimination - Chapter 17 of 27
Locomotion and Movement: Muscles and the Skeleton
During muscle contraction the A band never changes length at all, since the filaments themselves don't shrink, they just slide further into each other.
3 min readNCERT (Biology) · Locomotion and Movement - Chapter 18 of 27
Neural Control and Coordination
A resting neuron sits at about -70 millivolts purely because a pump keeps trading three sodium ions out for only two potassium ions in, a lopsided swap the whole nervous system runs on.
3 min readNCERT (Biology) · Neural Control and Coordination - Chapter 19 of 27
Chemical Coordination and Integration: The Endocrine System
The posterior pituitary doesn't actually make the two hormones it releases, it just stores and ships what the hypothalamus next door already produced.
4 min readNCERT (Biology) · Chemical Coordination and Integration - Chapter 20 of 27
Sexual Reproduction in Flowering Plants
A flowering plant's fertilization event is a double one, and the second fusion doesn't even make an embryo, it makes the tissue that will feed the embryo once it starts growing.
2 min readNCERT (Biology) · Sexual Reproduction in Flowering Plants - Chapter 21 of 27
Human Reproduction: The Menstrual Cycle
A rising hormone triggers a burst of a second hormone that then triggers the exact event named after it: the luteinising hormone surge is what actually makes ovulation happen.
2 min readNCERT (Biology) · Human Reproduction - Chapter 22 of 27
Reproductive Health: Law and Assisted Reproduction
GIFT places unfertilised eggs and sperm together in the fallopian tube and lets fertilization happen naturally inside the body, which is exactly what separates it from IVF and ZIFT.
3 min readNCERT (Biology) · Reproductive Health - Chapter 23 of 27
Principles of Inheritance and Variation
Mendel's pea crosses, monohybrid and dihybrid ratios, Morgan's fruit-fly linkage work, sex determination, sex-linked disorders and mitochondrial inheritance.
15 min readNCERT (Biology) · Genetics and Heredity, Mitochondrial Inheritance - Chapter 24 of 27
Common Diseases, AIDS, Cancer and Drug Abuse
Typhoid to viral hepatitis, malaria's mosquito life cycle, HIV versus AIDS, benign versus malignant tumours, and the real biology of drug abuse.
16 min readNCERT (Biology) · Health, viral hepatitis - Chapter 25 of 27
Microbes, Immunity and Modern Biotechnology
How NCERT links three topics: microbes as an industrial workforce, the immune system's B and T cells, and biotech tools like Bt cotton and gene therapy.
13 min readNCERT (Biology) · Microbes in Human Welfare; Human Health and Disease; Biotechnology and its Applications - Chapter 26 of 27
Recombinant DNA, PCR and Gene Editing Tools
The real biotechnology process: PCR, gel electrophoresis, competent cells, plasmid vectors, and how CRISPR-Cas9 and RNAi differ from cutting DNA.
15 min readNCERT (Biology) · Genetic engineering, CRISPR Cas9 technology - Chapter 27 of 27
Cloud Seeding and Weather Modification
How cloud seeding actually works, India's CAIPEEX, Varshadhare and Delhi trials, and the real science behind pollution-control weather technology.
13 min readShankar IAS, Environment · Pollution: Cloud Seeding