NCERT Solutions for class 11 Biology is written by expert faculty members of Physics Wallah having decade of teaching experience. There are 15 chapters in NCERT text book of class 11 Biology. Each chapter having one or two exercise having questions from 15 to 35. Our team solved all questions with required information and diagram as per the requirement of CBSE.
Right strategy for the preparation of school exam with NEET starts from class 11. With proper mix of NCERT text book and reference book. For a student career class 11 is very important and must have clear strategies to excel.
Do you know about 85 percent questions asked in NEET 2019 are directly from NCERT text book. Out of this about 45 percent form NCERT class 11 text book and rest 65 form NCERT text book of class 12. This data explains the important of NCERT class 11 Biology text book importance. With Physics WallahNCERT Solutionsfor class 12 Biology you will be ready will for all challenge.
Start your preparation with NCERT text book with NCERT solutions for class 11 Biology. Strat with the basics of class 11 Biology. Read first chapter of NCERT text book. Prepare your Notes form NCERT text book. While preparing notes form NCERT text book make sure you have added all important points given in class 11 biology section of Physics Wallah. Do solve the MCQ given in Physics Wallah. Solve all questions mentioned in NCERT text book.
Biology is subject of concept and diagram. While preparing Biology class 11 notes draw clear diagram mentioning all important points.
All the best.
NCERT class 11 Biology Chapter-Cell the Unit of Life
In this chapter you will learn The Unit of Life ; Structure and Function, Cell wall; Cell membrane; Endomembrane system (ER, Golgi apparatus/Dictyosome, Lysosomes, Vacuoles); Mitochondria; Plastids; Ribosomes; Cytoskeleton; Cilia and Flagella; Centrosome and Centriole; Nucleus; Microbodies. Structural differences between prokaryotic and eukaryotic, and between plant and animal cells. Cell cycle (various phases); Mitosis; Meiosis. Biomolecules – Structure and function of Carbohydrates, Proteins, Lipids, and Nucleic acids. Enzymes – Chemical nature, types, properties and mechanism of action.
NCERT Class 11 Biology chapter Structural Organisation in Animals
Basic principles of Classification, Need for Classification, Nomenclature, Levels of Classificaiton, Species concept, Diploblastic and triploblastic organisation, Symmetry, Coelom, Acoelomates, Pseudocoelomates, Eucoelomates, Methods of formation of eucoelom. Basic principles of classification-The terms systematics, taxonomy and classification are often used interchangeably. G. Simpson (1961) has distinguished these terms as follows
Systematics ( Gk. systema – order or sequence )
This term was coined by Linnaeus. The study of diversity of organisms, their comparative and evolutionary relationship based on comparative anatomy, ecology, physiology, biochemistry and other field is known as systematics.
Taxonomy (taxis – arrangement, nomos – law)
This term was coined by de Candolle (1813). It is the branch of biology which deals with the study of principles and procedures of classification, nomenclature and identification. Taxonomic knowledge requires the study of morphology, cytology, embryology, biochemistry, genetics and ecological relationship etc. Linnaeus is considered as father of taxonomy. But according to Turril taxonomy can be of following types
Taxonomy-Taxonomic study deals with collection and identification of organisms on the basis of gross morphology, compilation of flora and monographs.
Taxonomy-Taxonomic study deals with arranging species into natural classification on the basis of all available evidences.
Taxonomy-Taxonomic study deals with biological aspects of taxa like intraspecific population, speciation, rate of evolution and evolutionary trends
Classification-It is a subtopic of taxonomy or systematics that deals with arranging organisms into groups or categories according to a systematic plan on the basis of their similarities, differences and relationships.
Need for classification
Biological classification is the scientific procedure of arrangement of organisms into groups on the basis of their similarities and dissimilarities and arranging them in a hierarchy of categories. Following are the reasons which satisfy the need for classification
NCERT Class 11 Biology Chapter-Transport in Plants
Absorption of water: Introduction, Types of soil water, Water Potential, Diffusion, Imbibition, Osmosis, Plasmolysis, Mechanism of water absorption; Ascent of Sap: Definition, Mechanism of Ascent of Sap; Transpiration: Definition, Types of Transpiration, Mechanism of Stomatal opening and closing, Factors, Significance of Transpiration, Antitranspirants.
In flowering plant the substances that would need to be transported are water, mineral nutrients, organic nutrients and plant growth regulators. Over small distances substances move by diffusion and by cytoplasmic streaming supplemented by active transport. Transport over longer distances proceeds through the vascular system (the xylem and the phloem) is called Translocation.
NCERT Class 11 Biology chapter-Photosynthesis in Higher Plants
Definition, Structural organisation of chloroplast, Photosynthetic pigments, Mechanism of photosynthesis, Factors influencing photosynthesis, Photorespiration, Blackman’s law of limiting factors.
The ultimate source of energy for entire life on earth is solar energy. The only mechanism by which the solar energy can be trapped on earth is photosynthesis. By photosynthesis, the light energy is transformed into chemical potential energy and stored in the molecules of organic food, i.e. sugar molecules in plants. Besides this, photosynthesis is the only mechanism of generation of oxygen on earth. Hence; photosynthesis may be described as the lifeline for the biotic world.
Definition-It is described as synthesis of organic food from inorganic material by using energy of light in presence of chlorophyll. Meyer defined photosynthesis as the process of transformation of radiation energy to chemical potential energy. It is an anabolic and endergonic process, which uses the light energy inorder to photochemcially reduced CO2 into the carbohydrates.Von Niel (1931) was first to suggest that source of O2 released in photosynthesis was H2O and not CO2. This conclusion was given on the basis of the comparative analysis of reactants and products of photosynthesis in bacteria and higher plants. Bacteria do not use H2O as source of H; they do not release O2. Plants use H2O as source of H, they release O2.
NCERT class 11 Biology chapter-Respiration in Plants
Definition, Types of respiration, Mechanism of aerobic respiration, mechanism of anaerobic respiration, Respiratory quotient.
Cellular Respiration-It is the mechanism of breakdown of food materials within the cell to relase energy and the trapping of this energy for synthesis of ATP.
NCERT Class 11 Biology Chapter-Mineral Nutrition
Criteria for essentiality (Proposed by Arnon and Stout)
NCERT Class 11 Biology chapter-Plant Growth and Development
The growth curve consists of three phases of growth. They are
Q-1.What is the best way to us the NCERT textbook for class 11 Biology?
Ans- NCERT textbook is considered as one of the best books for class 11 Biology for CBSE board as well as for competitive entrance exams like NEET. In the year 2019, almost 90 percent of questions asked in NEET are directly from the NCERT textbook. The right approach to read the NCERT textbook is. Start from the first chapter read the theory given in the textbook and understand the concepts behind it. Read the bullet points given in the boxes and try to prepare notes of all important points given in the textbook. Once you complete the theory part try to solve all questions given in the exercise of the textbook and use Physics Wallah NCERT Solutions for class 11 Biology for reference.
Q-2. How NCERT class 11 biology can help me to score good marks in class 11?
Ans- In all most, all CBSE schools the recommend book is NCERT class 11 Biology. The syllabus of CBSE is well explained in NCERT textbooks. When you are preparing for your school exam either it is unit text or half-yearly or final exam questions are asked directly from NCERT exercise of theory parts. Read all examples given in the textbook complete the exercise make your notes and solve all MCQ based questions given in the Exercise. You can do more practice form NCERT exemplar of NCERT it consists of very good quality questions which enhanced your learning and understanding in the chapter.
Q-3. What are the most important chapters of class 11 biology in the NCERT textbook?
Ans- All chapter is equally important to build a solid foundation of class 11 biology still there are few topics which need more attention like Diversity in the living world, Cell structure, and functions, Structural organization in plants and Plant physiology, Reproduction in plants, Structural organization in animals, Human physiology, Human reproduction, Genetics, and Evolution is again very important and need time to understand, Biology and human welfare, Biotechnology and its applications, Ecology and Environment.
Q-4. NCERT textbook is enough for a good foundation of class 11 Biology?
Ans-Yes NCERT textbook for class 11 Biology is self-sufficient and you don’t require any other reference book for your school as well as a competitive entrance exam. Read thoroughly the NCERT class 11 Biology textbook to have clarity in the concept try to note down important points and diagrams as well.
Q-5. How to prepare notes to form the class 11 Biology textbook?
Ans- Notes are the most important and key part of Biology on which you must work. Preparing good quality notes will help you to achieve your goal and effective revision. Start preparing notes from the NCERT textbook as well as your school class make sure you are adding diagrams on your notes with proper tagging of important points and parts of diagram this will help you to remember the important points. Make a separate section for important points of chapter mentioning all-important points and information.