Biology Class 11 Solutions, MCQ, Notes, Book PDF Download

Notes For All Chapters Biology Class 11 CBSE The human body has several organs. These organs cannot perform their functions independently. In order to maintain homeostasis for the normal physiology of the human body, functions of these organs/organ systems in our body must be coordinated, so that they can work in proper manner. Topic 1 […]

Notes For All Chapters Biology Class 11 CBSE Topic 1 Musculature : Structure and Functions Movement Movement is defined as any visible change of position, exhibited either by the whole organism or any part of the body. It is one of the important characteristics of living organisms. The movement of living things are autonomic (self-sustained) […]

Notes For All Chapters Biology Class 11 CBSE Excretion is the removal of nitrogenous waste products and other metabolites from the animal body which is normally associated with the process of maintenance of osmibtic concentrations, i.e., osmoregulation within the body. Both excretion and osmoregulation are important for the maintenance of homeostasis, i.e., for keeping the […]

Notes For All Chapters Biology Class 11 CBSE Each and every cell of a multicellular organism require food, oxygen and vital components to survive. Simultaneously as a result of metabolism, cell also produces some useful and waste products. Substances that are useful, are transported to other cells, while harmful or waste substances are removed from […]

Notes For All Chapters Biology Class 11 CBSE Cells continuously use oxygen (O2) for the catabolic reactions that releases energy from molecules, e.g., breakdown of nutrient molecules like glucose. Thus, O2 has to be provided to the cells constantly. Simultaneously, these reactions releases carbon dioxide (CO2), which is harmful, so it must be removed quickly and […]

Notes For All Chapters Biology Class 11 Topic 1 Digestion: The System and Associated Glands Animals depend on ready-made food for their nutritional requirements. Nutrition is a process by which animal obtain essential and non-essential substances called nutrients. The way by which organisms derive their nutrients is called mode of nutrition. It is mainly of […]

Notes For All Chapters Biology Class 11 CBSE All plant organs are made up of various kinds of tissues which occupy specific locations within an organ and perform specific designated functions. Thus, the development of a plant follows a very precise pattern, during this period complex body organisation is formed, i.e., produces, roots, leaves, branches, […]

Notes For All Chapters Biology Class 11 CBSE All living organisms require a continuous supply of energy for their survival. Energy is used to carry out various functions such as uptake of materials, absorption, growth, development, movement and even breathing. About 50% of the energy produced by the cell is utilized by these cellular activities […]

Notes For All Chapters Biology Class 11 CBSE All animals including human beings depend on plants for their food. Green plant synthesize the food they need, and for all other organisms depend on them for their needs. Green plants carry out photosynthesis, a physio-chemical processor which they use the light energy to derive the synthesis […]

Notes For All Chapters Biology Class 11 Topic 1 Minerals and Their Importance Living organisms require a number of macromolecules, such as carbohydrates, proteins, fats, water and minerals in order to grow and develop. Thus, the inorganic substances or minerals that provide nourishment to the living organisms or wftrk as a raw material for body […]