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

Notes For All Chapters Biology Class 11 In flowering plants, a complex movement of materials take place in different directions. This is despite the fact that plants do not bear any circulatory system. Water taken up by the roots has to reach all the parts of the plant, up to very tip of the growing […]

Notes For All Chapters Biology Class 11 CBSE Each and every organism begins its life from single cell and grows to form large organism. All living cells grow in size and reproduce by dividing into two daughter cells, i.e., each parental cell divide and give rise to two daughter cells each time it divide, which […]

Notes For All Chapters Biology Class 11 CBSE A cell is composed of variety of molecules (like carbon, hydrogen, oxygen) which perform various functions. Other than these basic elements, some metals and non-metals are also present as cellular materials, thence, all these materials combines in different ways in order to form various biomolecules, which are […]

Notes For All Chapters Biology Class 11 CBSE Topic 1 Cell :An Overview An organism consist of one or more cells, accordingly there are two types of organisms, i.e., unicellular (composed of single cell) and multi cellular (composed of many cells). Cell Theory The cell theory was formulated by two German Scientists, Matthias Schneider and […]

Notes For All Chapters Biology Class 11 CBSE Topic 1: Animal Tissues Tissue All cells are well organised and coordinated to work in a group. A group of similar cells along with intercellular substances perform a specific function, such an organisation is called tissue. The term ‘Tissue’ was introduced by Bichat and he is known […]

Notes For All Chapters Biology Class 11 CBSE This chapter introduces the internal structure and functional organisation of higher plants. The study of internal structure of plant is called anatomy. 1. Tissues and Tissue Systems The plants have cells as their basic unit. Compared to animal cells, plant cells have a cell wall consisting of […]

Notes For All Chapters Biology Class 11 CBSE The angiosperms or flowering plants show a large diversity in external structure called as morphology (Gk. Morphe—form; logos—study). However, they all are characterised by the presence of roots, stems, leaves, flowers and fruits. 1. Flowering Plants The plant body consists of a main axis, which may be […]

Notes For All Chapters Biology Class 11 CBSE There are over a million species of animals that have been described till now. These vast species have diverse structural forms. Therefore, the need for classification of animals becomes very important. 1. Animals : Features & Basis of Classification The classification helps in easy identification and also […]

Notes For All Chapters Biology Class 11 CBSE 1.Basis of Classification and Algae, Bryophytes & Pteridophytes Our understanding of the plant kingdom has changed over time. Fungi and members of the Monera and Protista having cell walls have not been separated form Plantae, the earlier classifications kept them in the same kingdom. The kingdom-Plantae has […]

Notes For All Chapters Biology Class 11 CBSE Biological classification is the scientific procedure of arranging organisms in a hierarchical series of groups and sub-groups on the basis of their similarities and dissimilarities. 1.Need of Classification There have been many attempts to classify living organisms since ancient times. Aristotle was the earliest to attempt a […]