NEET Biology Notes PDF 2027 | Class 11 & 12

Class 11 Biology Chapter 4 The Animal Kingdom 50 NEET 2027 Level MCQs | NCERT + PYQ Based 📘 SECTION A: NCERT BASED MCQs - Q1 to Q30 Q1 Which phylum is characterized by presence of water vascular system? a) Porifera b) Coelenterata c) Echinodermata d) Annelida Q2 Notochord is present in which animals? a) Chordates b) Non-chordates c) Both d) None Q3 Which animal shows radial symmetry in adult stage? a) Tapeworm b) Starfish c) Earthworm d) Cockroach Q4 Cnidoblasts are present in? a) Porifera b) Coelenterata c) Platyhelminthes d) Aschelminthes Q5 Flatworms belong to phylum? a) Nematoda b) Platyhelminthes c) Annelida d) Arthropoda Q6 Pseudocoelom is present in? a) Aschelminthes b) Annelida c) Mollusca d) Echinodermata Q7 Jointed appendages are characteristic of? a) Mollusca b) Arthropoda c) Annelida d) Echinodermata Q8 Sea urchin belongs to? a) Hemichordata b) Echinodermata c) Chordata d) Arthropoda Q9 Which is not a chordate character? a) Notoc...

Hello friend 👋 NEET Biology Chapter 22: Chemical Coordination and Integration Free Detailed Notes 📚 Pituitary + Thyroid + Adrenal + Pancreas + Hormones PDF + Diagrams + MCQs Want it? DM me ❤️  ### *1. Endocrine System* *Endocrine Glands*: Ductless glands. Secrete *hormones* directly into blood   *Exocrine Glands*: Have ducts. Ex: Salivary, Sweat, Digestive glands   *Mixed Glands*: Both endocrine + exocrine. Ex: Pancreas, Gonads *Hormones*: Chemical messengers. Produced in trace amounts. Regulate metabolism ### *2. Human Endocrine System - Major Glands* #### *A. Pituitary Gland / Hypophysis* *Location*: Below hypothalamus. Attached by stalk   *Divided into 3 parts:* *1. Anterior Pituitary / Adenohypophysis* - *Growth Hormone GH / Somatotropin*: Growth of bones & tissues. Excess → Gigantism. Deficiency → Dwarfism - *Prolactin PRL*: Milk synthesis in mammary glands - *TSH*: Stimulates thyroid gland - *ACTH*: Stimulates adrenal cortex - *Gonadotropin...

*Hello Friends 👋 Today we will study Chapter 19 of Class 11 NCERT Biology: *Excretory Products and their Elimination* These notes are specially made for NEET aspirants. You’ll get detailed + short notes here. Read till the end and don’t forget to save these notes for revision 📚 Let’s get started... Chapter 19: Excretory Products and their Elimination - Class 11 NCERT*   _Detailed Short Notes for NEET - Expanded Version_ ### *1. EXCRETION* *Definition*: Removal of nitrogenous wastes and other toxic metabolic by-products from the body. *Why needed?*  To maintain *homeostasis* - constant internal environment for proper functioning of enzymes and cells. *Mode of excretion depends on*: Habitat, water availability, and evolutionary adaptation. --- ### *2. EXCRETORY PRODUCTS* Based on main nitrogenous waste Product Example Animals Toxicity Water Needed Solubility **Ammonia** Aquatic animals, bony fishes, tadpole Most toxic Very high Highly soluble **Urea** Mammals, amphibians,...

Hello friend 🌸 Just wanted to say you're amazing 💛 Keep smiling and keep shining  Chapter 18: Body Fluids and Circulation - Class 11 NCERT*   _Detailed Short Notes for NEET_ ### *1. BODY FLUIDS* Body fluids are responsible for transport of nutrients, O2, CO2, waste, hormones etc. *3 main types:* 1. *Blood* - Red, circulates in blood vessels 2. *Lymph* - Colorless, circulates in lymphatic system   3. *Interstitial fluid* - Fills gap between cells --- ### *2. BLOOD* Blood is a *specialized fluid connective tissue*.   *Volume*: 5-5.5L in adult. *pH*: 7.4 #### *A. PLASMA - 55%* - *90-92% Water* - *6-8% Proteins*:      - *Albumin* → Osmotic balance     - *Globulin* → Immunity, antibodies     - *Fibrinogen* → Blood clotting - *Other*: Glucose, amino acids, lipids, hormones, vitamins, Na+, K+, Ca++, HCO3-, Cl- - *Functions*: Transport, defense, clotting, maintaining body temp #### *B. FORMED ELEMENTS - 45%* *1. Erythrocyte...

Hello Friends 👋 As a NEET Dropper, I'm sharing my complete notes of Chapter 15: Plant Growth and Development with you all. Sigmoid Curve se leke 5 PGR tak - Full NCERT + PYQ + Google se Hatke Tricks!  2-3 Questions fix aate hain NEET me is chapter se 🔥 Jo coaching me bhi nahi milta wo yaha hai = Auxin ka Avena Test + GA ka Bakane Disease + Cytokinin ka Richmond-Lang + Ethylene Triple Response + ABA Stress Hormone Hope it helps you crack NEET 2027! 📚 Save for revision & Share with other droppers 💯 #NEET2027 #NEETDropper #PlantGrowthAndDevelopment #Auxin #Gibberellin #Cytokinin #Ethylene #ABA #Photoperiodism #Vernalization #NCERTBiology #BiologyNotes --- ### *1. GROWTH KYA HAI* `Definition Line` Definition = Irreversible Permanent Increase in Size, Volume, Weight, Dry Mass Features = Measurable + Quantitative + Accompanied by Metabolism Plant Growth = Indeterminate = Due to Meristems = Apical, Intercalary, Lateral Open Growth = New Cells Added Throughout Life = Leaves, Flower...

Hello Friends, As a NEET Dropper, I'm sharing my complete short notes of Chapter 2: Biological Classification with you all. Hope it helps you crack NEET 2027! 📚🔥 Save for revision & Share with other aspirants 💯*NEET 2027: Chapter 2 Biological Classification - Complete Short Notes* 🦠   _Class 11 Biology | NCERT + PYQ Hotspots | 3-4Q Fix Aate Hain_   ---   ### *1. Systems of Classification*   1. *Two Kingdom*: Linnaeus. Plantae & Animalia. _Problem_: Bacteria, Fungi, Euglena not fitted.   2. *Five Kingdom*: R.H. Whittaker 1969. Basis = Cell structure, Thallus org, Mode of nutrition, Reproduction, Phylogenetic relationships. **Kingdom** **Cell Type** **Cell Wall** **Nutrition** **Body Org** **Examples** **Monera** Prokaryotic Peptidoglycan Auto/Hetero Unicellular Bacteria, Cyanobacteria **Protista** Eukaryotic Present in some Auto/Hetero Unicellular Amoeba, Paramecium, Euglena **Fungi** Eukaryotic Chitin Heterotrophic, Absorptiv...

Hello friends, Class 11 Biology Chapter 1 The Living World ke complete notes, definitions aur NEET 2027 ke important MCQ yahan milenge.NEET 2027: Chapter 1 The Living World - Short Notes* 🧬   _Class 11 Biology | NCERT + PYQ   ### *1. What is Living?*   - *Life*: Cannot be defined by single property. Living organisms show defining features.   - *Defining Properties of Living Organisms* `NEET Gold` **Property** **Living** **Non-Living** **Exception** **Growth** Intrinsic, ↑ in mass & number Extrinsic, material added on surface Mountains, sand mounds grow **Reproduction** Produces progeny No reproduction Mules, sterile worker bees, infertile humans can't reproduce **Metabolism** Sum of all chemical reactions Absent Cell-free systems show metabolism **Cellular Organization** Made of cells No cellular org - **Consciousness** Respond to stimuli No response Plants respond to light, water *NEET Trap*: Growth, reproduction are NOT defining properties....

*NEET 2027: Chapter 13 Biodiversity and Conservation - Detailed Short Notes* 🌍   _Class 12 Biology | NCERT Line-by-Line + PYQ  4Q Tak Aa Sakte Hain_   ### *1. Biodiversity - Concept & Levels*   - *Term*: Edward Wilson = Father of Biodiversity. Coined 'biodiversity'.   - *Definition*: Combined diversity at all levels of biological organization.   - *3 Levels with NEET Examples*: **Level** **Meaning** **NEET Example** **Genetic Diversity** Diversity within species due to genes 1. 50,000 rice varieties in India  2. 1,000 mango varieties  3. Rauwolfia vomitoria = Reserpine variation **Species Diversity** Diversity at species level Western Ghats amphibians > Eastern Ghats **Ecological Diversity** Diversity at ecosystem level India: Deserts, Rainforests, Mangroves, Coral reefs, Alpine meadows ### *2. Magnitude of Biodiversity*   - *Described Species*: 1.7-1.8 million. Robert May estimate: Global = 7 million spe...

NEET Dropper here! Dropping complete Chapter 11 Notes for all NEET 2027 Aspirants 🔥  ### *NEET 2027: Chapter 11 Organisms and Populations - Expanded Notes*   _Class 12 Biology | NCERT Line-by-Line + PYQ + Diagrams_   ### *1. Organism & Its Environment*   - *Ecology*: Term by Ernst Haeckel. Study of interactions among organisms & with abiotic environment.   - *Hierarchy*: Organism → Population → Community → Ecosystem → Biome → Biosphere.   - *Major Abiotic Factors*:       1. *Temperature*: Most ecologically relevant. Affects enzyme kinetics. Avg temp on land: 0-50°C.       2. *Water*: Life originated in water. Desert = <10cm rainfall. Productivity of ocean limited by light.       3. *Light*: Photosynthesis, foraging, migration, reproduction. UV = harmful.       4. *Soil*: Weathering of rocks. pH, minerals, topography decide vegetation. ...