NEET Practice Questions | Biology, Physics, Chemistry

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 Planetary scientists analyzing oxygen isotopes in lunar soil from the Apollo mission sites conclude that meteorite bombardment over 4 billion years could only have delivered a tiny fraction of Earth’s water, forcing researchers to rethink a long-held theory. Meteorites' bombardment of Earth early in the development of the Solar System may have been a significant source of Earth's water, according to previous research. Dr. In a new study, Tony Gargano from NASA’s Johnson Space Center and the Lunar and Planetary Institute and colleagues used a novel method for analyzing the dusty debris that covers the Moon’s surface called regolith. They discovered that meteorite delivery since approximately 4 billion years ago could only have supplied a small portion of Earth's water, even under optimistic assumptions.  The Moon serves as an ancient archive of the impact history the Earth-Moon system has experienced over billions of years. Where Earth’s dynamic crust and weather erase such...

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  Class 11 Biology – Chapter 5 Morphology of Flowering Plants (Short Notes) 1. Root The underground part of the plant. Functions: Absorption of water and minerals, anchorage. Types: Tap Root – Found in dicot plants (e.g., mustard) Fibrous Root – Found in monocot plants (e.g., wheat) Adventitious Root – Arises from stem or leaves 2. Stem The ascending part of the plant axis. Functions: Transport of water and food, bears leaves, flowers, and fruits. Modified stems: Rhizome, Tuber, Bulb (for storage) 3. Leaf The main organ of photosynthesis. Parts: Leaf base, Petiole, Lamina Types: Simple Leaf Compound Leaf Phyllotaxy (leaf arrangement): Alternate, Opposite, Whorled 4. Inflorescence Arrangement of flowers on the floral axis. Types: Racemose Cymose 5. Flower The reproductive organ of flowering plants. Parts: Calyx Corolla Androecium Gynoecium 6. Fruit Develops from ovary after fertilization. Types: Simple Fruit Aggregate Fruit Multiple Fruit 7. Seed A mature ovule containing an embr...

Class 11 Biology – Chapter 4: Animal Kingdom Introduction Class 11 Biology Chapter 4 Animal Kingdom deals with the classification of animals based on their body structure, organization, symmetry, coelom, and evolutionary relationships. This chapter is very important for board exams as well as NEET and other competitive exams . What is Animal Kingdom? The Animal Kingdom (Animalia) includes all multicellular, eukaryotic, heterotrophic organisms that lack cell walls. Most animals show active movement , well-developed nervous coordination , and complex organ systems. Basis of Classification of Animals Animals are classified on the following bases: Level of organization – Cellular, tissue, organ, organ system Body symmetry – Asymmetrical, radial, bilateral Germ layers – Diploblastic, triploblastic Body cavity (Coelom) – Acoelomate, pseudocoelomate, coelomate Segmentation – Metameric or non-metameric Presence or absence of notochord Major Phyla of Animal Kingdom 1. Porifera Porifer...

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 IMPORTANT UPDATE FOR ALL STUDENT Resolve and Rise in 2026 with Unacademy NEET Kickstart your NEET preparation in 2026 with  Unacademy RESOLVE  and take a strong step toward success. Unacademy is offering a  flat 60% off on NEET subscriptions , giving students access to top educators, structured courses, live classes, and high-quality study material. This limited-time offer comes with  assured success tools  to help you stay ahead in your NEET journey. ⏰  Hurry! Offer ends tonight. 🎯 Use code  PLUS39FRK  and enroll now to unlock premium learning at an affordable price. Prepare smart. Rise higher. Resolve with Unacademy. 🚀 BUY LINK :-  JOIN NOW TG LINK :-  JOIN NOW Class 11 Biology Chapter 3: Plant Kingdom Introduction Class 11 Biology Chapter 3 Plant Kingdom is one of the most important chapters for CBSE board exams and NEET preparation. This chapter explains the diversity of plants, their classification, life cycles, and evoluti...

🧬 NEET Biology Chapter 2: Biological Classification – Complete Notes (NCERT Based) ✍️ Introduction Biological Classification is Chapter 2 of Class 11 Biology (NCERT) and a very important chapter for NEET . Every year 1–2 questions are asked directly from this chapter. In this chapter, we study how living organisms are classified into different groups based on their characteristics. 📌 Why Biological Classification is Important for NEET? Direct NCERT-based MCQs Repeated questions from Five Kingdom Classification Important for Microbiology & Cell Biology Easy scoring chapter if concepts are clear 🔬 What is Biological Classification? Biological classification is the scientific method of grouping organisms based on similarities and differences. Objectives: Easy study of organisms Proper identification Understanding evolutionary relationships 🧪 Five Kingdom Classification (R.H. Whittaker – 1969) R.H. Whittaker classified organisms into five kingdoms based on: Cell structure Body ...

Class 11 Biology Chapter 1: The Living World – Short Notes 1. What is the Living World? The living world includes all living organisms present on Earth such as plants, animals, microorganisms, fungi, and humans. Living organisms show common characteristics like growth, metabolism, reproduction, and response to stimuli. 2. Characteristics of Living Organisms Living organisms can be identified by the following features: Growth – Increase in size and mass due to cell division. Reproduction – Ability to produce new individuals of the same species. Metabolism – Sum total of all chemical reactions occurring in the body. Respiration – Process of releasing energy from food. Response to Stimuli – Ability to respond to environmental changes. 3. Diversity in the Living World There is a huge variety of living organisms on Earth. They differ in size, shape, habitat, nutrition, and life span. To study them easily, scientists classify organisms into groups. 4. Need for Classification Classificat...

NEET 2025 Chapter-wise MCQs in Hindi – Physics, Chemistry, Biology with Answers NEET 2025 की तैयारी में Chapter-wise MCQs का अभ्यास बेहद ज़रूरी है। यह पोस्ट Physics, Chemistry और Biology के महत्वपूर्ण चैप्टर्स के MCQs हिंदी में प्रदान करती है। हर प्रश्न के साथ सही उत्तर और स्पष्टीकरण भी दिया गया है, जिससे आप अपनी तैयारी को और मजबूत बना सकते हैं। इस पोस्ट में आप Units & Dimensions, Mole Concept, Cell Structure & Function जैसे महत्वपूर्ण चैप्टर्स से MCQs देखेंगे। ये प्रश्न आपको NEET परीक्षा के लिए concept clear करने और तेज़ रीविजन में मदद करेंगे। 📘 Physics – MCQs Physics में Units & Dimensions और Mechanics सबसे बेसिक और scoring चैप्टर्स हैं। यहाँ से पूछे जाने वाले प्रश्न अक्सर short reasoning और concept पर आधारित होते हैं। Chapter: Units & Dimensions Q1. निम्न में से कौन-सा भौतिक राशि आयामहीन (dimensionless) है? A. Velocity B. Acceleration C. Strain D. Force ✔ सही उत्तर: C. Strain Explanation: Strain एक ratio है (change in length/original length), इसलिए इसका कोई dimen...

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NEET Biology MCQs – Human Respiratory System This post is specially designed for NEET (UG) aspirants. All questions are NCERT-based and provided with correct answers and easy explanations. Q1. In humans, the exchange of gases takes place in: A. Trachea B. Bronchus C. Alveoli D. Larynx ✅ Correct Answer: C. Alveoli Explanation: Alveoli are thin-walled air sacs surrounded by capillaries where oxygen and carbon dioxide exchange occurs. Q2. What is the main function of haemoglobin? A. Digestion of food B. Transport of oxygen C. Blood clotting D. Immunity ✅ Correct Answer: B. Transport of oxygen Explanation: Haemoglobin present in RBCs binds with oxygen in the lungs and transports it to body tissues. Q3. Which part of the brain controls respiration? A. Cerebrum B. Cerebellum C. Medulla oblongata D. Hypothalamus ✅ Correct Answer: C. Medulla oblongata Explanation: The medulla oblongata regulates involuntary actions such as breathing and heart rate....

Q1. The scientific study of identification, nomenclature and classification of organisms is called:         A) Ecology        B) Taxonomy       C) Cytology      D) Genetics Answer:B Q2. the concept of binomial nomenclature was proposed by:       A) Darwin      B) Lamarck     C) Linnaeus   D) Mendel Answer:C Q3. In binomial nomenclature, the first word represents the:         A) Species       B) Genus      C) Family     D) Order Answer:B Q4. In scientific naming, the genus name starts with:        A) Small letter        B) Capital letter      C) Italic letter only     D) Bold letter Answer:B Q5. Scientific names are usually written in which language?        A) English       B) Greek      C) Latin  ...

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🌿 BOTANY & 🐾 ZOOLOGY – Top 25 Most Important MCQs (Exam Oriented) Introduction यह पोस्ट NEET, SSC, UPSC, Railway, Nursing और अन्य competitive exams के लिए बेहद उपयोगी है। इसमें Botany और Zoology के सबसे महत्वपूर्ण MCQs दिए गए हैं, जो बार-बार परीक्षाओं में पूछे जाते हैं। 🌿 BOTANY – Top 25 Most Important MCQs 1. Light reaction of photosynthesis occurs in A. Stroma B. Grana C. Cytoplasm D. Mitochondria ✅ Answer: B 2. CO₂ fixation in Calvin cycle is done by A. PEP carboxylase B. RuBisCO C. ATP synthase D. NADP reductase ✅ Answer: B 3. First stable product of C₄ cycle is A. PGA B. RuBP C. Oxaloacetic acid D. Malic acid ✅ Answer: C 4. Nitrogen fixation enzyme is A. Catalase B. Nitrogenase C. Dehydrogenase D. Nitrate reductase ✅ Answer: B 5. Transpiration pull occurs through A. Phloem B. Xylem C. Cambium D. Cortex ✅ Answer: B 6. Leading strand in DNA replication is synthesized A. Discontinuously B. Continuously C. Both D. None ✅ Answer: B 7. Genetic code is A. Ambiguous B. Overlappi...