March 2022

Biology Notes for Class 12 Chapter 3: Human Reproduction Chapter Summary              Humans are sexually reproducing and viviparous. The male reproductive system is composed of a pair of testes, the male sex accessory ducts and the accessory glands and external genitalia. Each testis has about 250 compartments called testicular lobules, […]

Biology Notes for Class 12 Chapter 2: Sexual Reproduction in Flowering Plants Chapter Summary           Flowers are the seat of sexual reproduction in angiosperms. In the flower, androecium consisting of stamens represents the male reproductive organs and gynoecium consisting of pistils represents the female reproductive organs.          

Biology Notes for Class 12 Chapter 15. Biodiversity and Conservation Chapter Summary           Since life originated on earth nearly 3.8 billion years ago, there had been enormous diversification of life forms on earth. Biodiversity refers to the sum total of diversity that exists at all levels of biological organisation. Of particular

Biology Notes for Class 12 Chapter 13. Organism and Populations Chapter Summary           As a branch of biology, Ecology is the study of the relationships of living organisms with the abiotic (physico-chemical factors) and biotic components (other species) of their environment. It is concerned with four levels of biological organisation-organisms, populations,

Biology Notes for Class 12 Chapter 12. Biotechnology and Its Applications Chapter Summary           Biotechnology has given to humans several useful products by using microbes, plant, animals and their metabolic machinery. Recombinant DNA technology has made it possible to engineer microbes, plants and animals such that they have novel capabilities. Genetically

Biology Notes for Class 12 Chapter 11. Biotechnology: Principles and Processes Chapter Summary Biotechnology deals with large scale production and marketing of products and processes using live organisms, cells or enzymes. Modern biotechnology using genetically modified organisms was made possible only when man learnt to alter the chemistry of DNA and construct recombinant DNA. This

Biology Notes for Class 12 Chapter 10. Microbes in Human Welfare Chapter Summary Microbes are a very important component of life on earth. Not all microbes are pathogenic. Many microbes are very useful to human beings. We use microbes and microbially derived products almost every day. Bacteria called lactic acid bacteria (LAB) grow in milk

Biology Notes for Class 12 Chapter 8. Human Life and Disease Chapter Summary Health is not just the absence of disease. It is a state of complete physical, mental, social and psychological well-being. Diseases like typhoid, cholera, pneumonia, fungal infections of skin, malaria and many others are a major cause of distress to human beings.

Biology Question Bank for Class 12 Chapter 1: Reproduction in Organism Chapter Summary           Reproduction enables a species to live generation after generation. Reproduction in organisms can be broadly classified into asexual and sexual reproduction. Asexual reproduction does not involve the fusion of gametes. It is common in organisms that have

Biology Notes for Class 12 Chapter 1. Reproduction in Organism Chapter 2. Sexual Reproduction in Flowering Plants Chapter 3. Human Reproduction in Organi Click Here Master Mind CBSE Question Bank –Economics Class 12 |Term 2 | For CBSE Board (Includes MCQs) Master Mind CBSE Question Bank –Accountancy Class 12 |Term 2 | For CBSE Board