Free NCERT Solutions Class 11 Biology to download in PDF. NCERT books for class xi and their chapter wise solutions are given under the each chapter. Main points of chapters, which must be done, is given below each chapter to learn. Chapter wise test divided into three levels and solutions will be uploaded on all three Tiwari Academy websites. These test will follow the latest CBSE syllabus 2017 – 2018. For more information, you may visit to official CBSE website.
NCERT Solutions Class 11 Biology
Solutions of class 11th bio is given below with NCERT chapters to online study. All chapters are reviewed as per requirement of changes. Extra study material will be provided in every update. Be connected to get the latest and modified contents for the CBSE Examination 2017-18.
Chapter 1: The Living World
Discussion about living in the living world. Need of classification of biodiversity into three domains of life. Taxonomy and concept of species & hierarchy. Tools for study of taxonomy museum, zoological parks, herbaria and botanical gardens.
Chapter 2: Biological Classification
Biological Classification of five kingdom according to their salient features. Classification of Fungi, Protista and Monera into three major groups. Description about lichens, viruses and viroids.
Chapter 3: Plant Kingdom
Salient feature and Classification of plant kingdom into main major groups – Algae, Bryophyta, Gymnospermae and angiospermae. Similarity and differences between the groups with examples.
Chapter 4: Animal Kingdom
Classification and features of animal kingdom into non – chordates (up to phyla level) and chordates (up to class level). Features of all category with examples.
Chapter 5: Morphology of Flowering Plants
Morphology of flowering plants means the study of various external features, forms and relative position of different organs of the flowering plants. It can be divided into internal (Anatomy and histology) and external morphology (External forms like shape, size, colour, structure and relative position of different organs).
Chapter 6: Anatomy of Flowering Plants
Anatomy of flowering plants deals the study of internal structure of plants. It includes organisation and structure of tissues (A group of cells having a common origin and usually performing a common function like meristematic and permanent tissues).
Chapter 7: Structural Organisation in Animals
Almost all animal tissues, specialised junction provide the structural organisation in animals. Types of junctions are – Tight junctions (Plasma membranes of adjacent cells are fused at intervals), Adhering junctions (perform cementing function to keep neighboring cells together) and Gap junction (Facilitate the cells to communicate with each other by connecting the cytoplasm of adjoining cells for rapid transfer of ions, small molecules and sometimes big molecules).
Chapter 8: Cell: The Unit of Life
According to Cell theory all living organism are made up of cells and products of cells and all cells arise from pre-existing cells. The theory was proposed by Scheleiden & Schwann and modified by Rudolf Virchow.
Chapter 9: Biomolecules
Chemical constituents of a living cell – biomolecules, structure and functions of carbohydrates, proteins, lipids and nucleic acids. Types of enzymes and their action on the organs. Properties of different types of enzymes.
Chapter 10: Cell Cycle and Cell Division
The cell cycle refer to the sequence of events by which a cell duplicates its genome, synthesises the other constituents of the cell and eventually divides into two daughter cells. Phases of cell cycle – Inter-phase and M phase (mitosis phases).
Chapter 11: Transport in Plants
Transport in plants consists of translocation – long distance transport – transport of substances in plants over longer distances through the vascular tissue (xylem & phloem). The transport of water and mineral in xylem is unidirectional while transport of organic and mineral nutrients in phloem is multi directional.
Chapter 12: Mineral Nutrition
Essential elements in mineral nutrition in plants. Macro-nutrients – macro-nutrients (C, H, O, N, P, K, S, Ca, Mg) are present in plant tissues in concentrations of more than 10 mole/kg of dry matter. Micro-nutrients – micro-nutrients (Fe, Mn, Cu, Mo, Zn, B, Cl and Ni) are needed in very low amount less than 10 mole/kg of matter.
Chapter 13: Photosynthesis in Higher Plants
Photosynthesis in higher plants: Photosynthesis is an enzyme regulated anabolic process of manufacture of organic compounds inside the chlorophyll containing cells from carbon dioxide and water with the help of sunlight as a source of energy.
Chapter 14: Respiration in Plants
Respiration in Plants: Aerobic respiration – Complete oxidation of organic food in presence of oxygen there by producing carbon dioxide, water and energy. Anaerobic respiration – Incomplete breakdown of organic food to release energy in the absence of oxygen.
Chapter 15: Plant Growth and Development
Seed germination, abscission – shedding of plant organs, apical dominance, dormancy – a period of suspended activity, phytochrome – a pigment found in plants which control the light dependent development activities, sensecene – the last phase of growth, vernalisation -a method of promoting flowering by exposing the young plant to low temperature.
Chapter 16: Digestion and Absorption
Digestion is the process in alimentary canal by which the complex food is converted mechanically and biochemically into simple substances suitable for absorption and assimilation. Absorption of digested food into blood or lymph and its use in the body cells for synthesis of complex components is done under assimilation.
Chapter 17: Breathing and Exchange of Gases
Breathing and exchange of gases – Breathing is the process of exchange of oxygen from the atmosphere with carbon dioxide produce by the cells. Inspiration – Oxygen from fresh air taken by lungs and diffuses into the blood. Expiration – Carbon dioxide given up by venous blood in the lungs is sent out to exterior. Respiration – The sum total of physical and chemical processes by which oxygen and carbohydrates etc are assimilated into the system and the oxidation products like carbon dioxide and water are given off.
Chapter 18: Body Fluids and Circulation
Body fluids and circulation – Digestion converts the complex food machanically and biochemically into simple substances suitable for absorption and assimilation. The teeth embedded in the sockets of the jaw bone is called thecodont. These teeth formed twice in life time (Diphyodont). An adult human has 32 permanent teeth which are of four different types – Incisor, Canine, Premolar and Molar.
Chapter 19: Excretory Products and Their Elimination
Chapter 20: Locomotion and Movement
Chapter 21: Neural Control and Coordination
Chapter 22: Chemical Coordination and Integration
NCERT Solutions Class 11 Biology will be updated as per requirement of students. The changes will be done on your suggestions. Assignments and chapter wise test are being prepared and will be uploaded under each chapter very soon.