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 friend 👋 NEET Biology Chapter 21: Neural Control and Coordination Free Detailed Notes 📚 Brain + Neuron + Reflex + Disorders PDF + MCQs ### *Chapter 21: Neural Control and Coordination* ### *1. Neural System in Humans* *Functions*: Point-to-point coordination, Fast, Voluntary + Involuntary actions *2 Parts:* 1. *Central Neural System CNS*: Brain + Spinal Cord 2. *Peripheral Neural System PNS*: All nerves of body *PNS is further divided:* - *Somatic Neural System SNS*: Voluntary. Transmits impulses from CNS to skeletal muscles - *Autonomic Neural System ANS*: Involuntary. Controls visceral organs       - *Sympathetic*: Fight & Flight      - *Parasympathetic*: Rest & Digest - *Visceral Neural System*: Part of ANS. Inner organs ### *2. Neuron - Structural & Functional Unit of Neural System* *Parts of Neuron:* 1. *Cell body / Cyton*: Contains nucleus, Nissl's granules. Protein synthesis 2. *Dendrites*: Short branches. Receive impulses 3....

*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,...

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. ...