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Biology Presentations for Class 12 Chapter 1: Reproduction in Organism Disclaimer: All contents are originally prepared by Shri K C Meena Ji, Principal, KVS.  Class 12 Biology Chapter 3 Human Reproduction Class 12 Biology Chapter 2 Sexual Reproduction in Flowering Plants Class 12 Biology Chapter 13 Organism and Populations Class 12 Biology Chapter 12 Biotechnology […]

Biology Notes for Class 12 Chapter 5: Principles of Inheritance and Variation Chapter Summary            Ø Genetics is a branch of biology which deals with principles of inheritance and its practices. Progeny resembling the parents in morphological and physiological features has attracted the attention of many biologists. Mendel was the first

Biology Notes for Class 12 Chapter 4: Reproductive Health Chapter Summary           Reproductive health refers to a total well-being in all aspects of reproduction, i.e., physical, emotional, behavioural and social. Our nation was the first nation in the world to initiate various action plans at national level towards attaining a reproductively

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