CBSE Class 11 Biology Notes, NCERT Solutions, Sample & Previous Year Papers

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 as the father of animal histology. A tissue […]

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 a primary cell wall, secondary cell wall and […]

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 branched or unbranched bearing lateral appendages. The main […]

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 in assigning a systematic position to newly described […]

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 been described under algae, bryophytes, pteridophytes, gymnosperms and […]

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 scientific basis of classification. He used simple morphological […]

1.Living World: Characteristics The earth serves as a home for diverse living organisms. The organisms live in various habitats like forests, mountains, deserts, oceans, freshwater bodies, hot springs, polar regions and almost every place of the earth. Living things possess certain characteristics, which makes Some of these important characteristics are shown in the flowchart given […]

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   Transport In Plants   Mineral Nutrition   Photosynthesis In Higher Plants   Respiration […]