The NCERT Class 11 Biology Notes are helpful for students preparing for board exams and entrance tests like NEET. These notes give a short and clear summary of each chapter. The notes are prepared by subject experts in simple language. All important diagrams and flow charts from the textbook are added. When students have less time to study, these notes are very useful. They can easily revise important topics with the help of the NCERT notes and score well in the exams.
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Class 11 Biology Notes cover all the important chapters, including diversity in living things, the structure of plants and animals, cells, and processes of the human body. Difficult topics like photosynthesis, respiration, biomolecules, and body systems are explained in simple terms. The NCERT notes for Class 11 are a valuable resource because they cover all topics simply and clearly. Students can also download the 11 Class Biology Notes PDF for offline study anywhere.
For Class 11 students who are preparing for competitive exams, a strong foundation in Biology is very important to achieve success. This subject has the highest weightage in the NEET exam. Knowing the subject-wise weightage allows students to plan their preparation and revise effectively. When students are aware of the marks distribution, it becomes easy to focus on the most important topics first. This method not only helps in school exams but also builds a strong base for future entrance exams.
Assessment Structure:
Total Marks: 100
Theory: 70 marks
Practical Examination: 30 marks
Passing Criteria:
Students need to score at least 33% overall (theory + practicals)
Minimum 23 out of 70 in the theory paper
Minimum 10 out of 30 in the practicals
Also read, Subject-Wise NCERT Notes
The notes include 19 chapters, with easy and well-understandable language. They provide a clear explanation of all important topics. The 11th class forms the base for all advanced topics that will appear in Class 12. Thus, it becomes important for Class 11 students to understand each topic and concept clearly. To make the study pattern easy, students should focus on the Class 11 Biology Notes and NCERT Solutions.
These notes explain all the important concepts, diagrams, and frequently asked questions. Students can easily download all 11 Class Biology Notes PDF for free and score good marks in their examination.
The following are the links to download the PDF for all Chapters. These notes will help you understand the topics better and revise quickly before exams.
The Biology of Class 11 is divided into 19 different chapters. Each chapter has important concepts that build the understanding of life sciences. The different chapters under the units are mentioned below:
Topics Covered:
Topics Covered:
Five Kingdom classification system
Kingdom | Characteristics |
---|---|
Prokaryotic organisms | |
Eukaryotic, unicellular or colonial | |
Heterotrophic, decomposers | |
Autotrophic, photosynthetic | |
Multicellular, heterotrophic |
Topics Covered:
Division | Characteristics |
---|---|
Chlorophyceae | Green algae, chlorophyll a and b |
Phaeophyceae | Brown algae, chlorophyll a and c |
Rhodophyceae | Red algae, chlorophyll a and d |
Bryophyta | Liverworts, mosses |
Pteridophyta | Ferns, vascular plants |
Gymnospermae | Conifers, cycads, ginkgo |
Angiospermae | Flowering plants, seeds enclosed in fruits |
Topics Covered:
Phylum | Characteristics |
---|---|
Sponges, simple multicellular structures | |
Jellyfish, corals, radial symmetry | |
Ctenophora | Comb jellies, bilateral symmetry |
Flatworms, acoelomate | |
Roundworms, pseudocoelomate | |
Annelida | Segmented worms, setae |
Arthropoda | Jointed appendages, exoskeleton |
Mollusca | Soft-bodied, shell present |
Radial symmetry, water vascular system | |
Chordata | Notochord, dorsal hollow nerve cord |
Topics Covered:
Part | Function |
---|---|
Root | Anchorage, absorption of water and minerals |
Stem | Support, transport of water and minerals |
Leaf | Photosynthesis |
Inflorescence | Arrangement of flowers |
Flower | Reproductive structure |
Fruit | Developed from the ovary, contains seeds |
Seed | An embryonic plant enclosed in a covering |
Topics Covered:
Tissue | Function |
---|---|
Growth and development | |
Epidermal | Protective layer |
Support and storage | |
Vascular | Transport of water and nutrients |
Topics Covered:
Animal tissues, organs, and organ systems
Morphology and anatomy of frog
Topics Covered:
Component | Function |
---|---|
Cell Membrane | Regulates movement in and out of the cell |
Cell Wall | Provides structural support |
Endomembrane | Includes ER, Golgi apparatus, and lysosomes |
Topics Covered:
Biomolecule | Function |
---|---|
Proteins | Structural, enzymatic, and hormonal functions |
Polysaccharides | Energy storage, structural roles |
Nucleic Acids | Genetic information storage |
Topics Covered:
Phase | Description |
---|---|
Prophase | Chromatin condenses, nuclear envelope breaks down |
Metaphase | Chromosomes align at the metaphase plate |
Anaphase | Sister chromatids separate |
Telophase | Nuclear envelope reforms |
Cytokinesis | Cytoplasm divides |
Topics Covered:
Process | Description |
---|---|
Light Reaction | Light-dependent reactions, ATP and NADPH production |
CO2 fixation into glucose |
Topics Covered:
Process | Description |
---|---|
Glycolysis | Breakdown of glucose to pyruvate |
Fermentation | Anaerobic breakdown of pyruvate |
TCA Cycle | Aerobic breakdown of acetyl-CoA |
Topics Covered:
Regulator | Function |
---|---|
Promote cell elongation | |
Promote seed germination, stem elongation | |
Cytokinins | Promote cell division |
Topics Covered:
Process | Description |
---|---|
Inhalation | Air enters the lungs |
Exhalation | Air leaves the lungs |
Diffusion | Gas exchange between alveoli and blood |
Topics Covered:
Component | Function |
---|---|
Blood | Transport of gases, nutrients, and waste |
Lymph | Returns tissue fluid to blood |
Heart | Pumps blood throughout the body |
Topics Covered:
Organ | Function |
---|---|
Kidneys | Filter blood, form urine |
Ureters | Transport urine to the bladder |
Bladder | Stores urine |
Topics Covered:
System | Function |
---|---|
Provides movement and support | |
Skeletal | Provides framework and support |
Topics Covered:
Component | Function |
---|---|
Neurons | Conduct impulses |
Synapse | Junction between neurons |
Brain | Controls body functions |
Topics Covered:
Gland | Hormone(s) | Function |
---|---|---|
Releasing hormones | Regulates the pituitary gland | |
Growth hormone, ACTH, TSH, FSH, LH | Controls other endocrine glands | |
Thyroxine (T4), Triiodothyronine (T3) | Regulates metabolism | |
Adrenal | Adrenaline, Cortisol | Stress response, electrolyte balance |
Pancreas | Insulin, Glucagon | Regulates blood sugar levels |
Students can grasp the complex topics easily and make their studies well-organized by using these notes. These notes save time and make learning more effective. Some of the important benefits are given below:
11 Class Biology Notes PDF helps in easy revision before exams.
It covers all important topics from the NCERT textbook.
These notes are designed by subject experts and are useful for both school and competitive exams like NEET.
The NCERT Class 11 Biology Notes help a lot in doing self-study.
Students can also understand the difficult topics easily.
Subject-Wise NCERT Solutions
The notes are very important for revision as well as for exams. They come with several features, some of which are listed below:
Students can use the notes for last-minute revision.
Real-life examples are added, which makes learning biology easier.
Students can access the 11 Class Biology Notes PDF totally free.
The notes are based on the latest syllabus.
The NCERT Class 11 Biology Notes include diagrams to improve visual learning.
Frequently Asked Questions (FAQs)
The Class 11 Biology Notes include a total of 19 chapters. The chapters are:
The Living World,
Biological Classification,
Plant Kingdom,
Animal Kingdom,
Morphology of Flowering Plants,
Anatomy of Flowering Plants,
Structural Organisation in Animals,
Cell: The Unit of Life,
Biomolecules,
Cell Cycle and Cell Division,
Photosynthesis in Higher Plants,
Respiration in Plants,
Plant Growth and Development,
Breathing and Exchange of Gases,
Body Fluids and Circulation,
Excretory Products and Their Elimination,
Locomotion and Movement,
Neural Control and Coordination, and
Chemical Coordination and Integration.
Students can download and access the chapter-wise Class 11 Biology notes through Careers360 website which is,
https://school.careers360.com/ncert/ncert-class-11th-biology-notes
Visit this link to download Class 11 Biology NCERT for free. https://ncert.nic.in/textbook.php?kebo1=0-22
Class 11 NCERT concepts are also asked in the NEET exam every year, so these notes will definitely help.
NCERT Class 11 Biology chapter wise notes discuss all the chapters covered in the Class 11 NCERT book.
This ebook serves as a valuable study guide for NEET 2025 exam.
This e-book offers NEET PYQ and serves as an indispensable NEET study material.
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