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CHAPTER 10 MICROBES IN HUMAN WELFARE
Read More: CHAPTER 10 MICROBES IN HUMAN WELFARE10.1 Microbes in HouseholdProducts10.2 Microbes in IndustrialProducts10.3 Microbes in SewageTreatment10.4 Microbes in Production ofBiogas10.5 Microbes as BiocontrolAgents10.6 Microbes as Biofertilisers Besides macroscopic plants and animals, microbes arethe major components of biological systems on this earth.You have studied about the diversity of living organismsin Class XI. Do you remember which Kingdoms amongthe living organisms contain micro-organisms?…
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CHAPTER 9 STRATEGIES FOR ENHANCEMENTIN FOOD PRODUCTION
Read More: CHAPTER 9 STRATEGIES FOR ENHANCEMENTIN FOOD PRODUCTION9.1 Animal Husbandry9.2 Plant Breeding9.3 Single Cell Proteins9.4 Tissue Culture With ever -increasing population of the world,enhancement of food production is a major necessity.Biological principles as applied to animal husbandry andplant breeding have a major role in our efforts to increasefood production. Several new techniques like embryotransfer technology and tissue culture techniques are goingto play…
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CHAPTER 7 EVOLUTION
Read More: CHAPTER 7 EVOLUTION7.1 Origin of Life7.2 Evolution of Life Forms – ATheory7.3 What are the Evidencesfor Evolution?7.4 What is AdaptiveRadiation?7.5 Biological Evolution7.6 Mechanism of Evolution7.7 Hardy – WeinbergPrinciple7.8 A Brief Account ofEvolution7.9 Origin and Evolution ofMan Evolutionary Biology is the study of history of life formson earth. What exactly is evolution? To understand thechanges in flora and…
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CHAPTER 5 PRINCIPLES OF INHERITANCEAND VARIATION
Read More: CHAPTER 5 PRINCIPLES OF INHERITANCEAND VARIATION4.1 Mendel’s Laws ofInheritance4.2 Inheritance of One Gene4.3 Inheritance of Two Genes4.4 Sex Determination4.5 Mutation4.6 Genetic Disorders Have you ever wondered why an elephant always givesbirth only to a baby elephant and not some other animal?Or why a mango seed forms only a mango plant and notany other plant?Given that they do, are the offspring…
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CHAPTER 4 REPRODUCTIVE HEALTH
Read More: CHAPTER 4 REPRODUCTIVE HEALTH3.1 Reproductive Health –Problems and Strategies3.2 Population Explosion andBirth Control3.3 Medical Termination ofPregnancy3.4 Sexually TransmittedDiseases3.5 Infertility You have learnt about human reproductive system and itsfunctions in Chapter 2. Now, let’s discuss a closely relatedtopic – reproductive health. What do we understand bythis term? The term simply refers to healthy reproductiveorgans with normal functions. However, it…
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CHAPTER 3 HUMAN REPRODUCTION
Read More: CHAPTER 3 HUMAN REPRODUCTION2.1 The Male ReproductiveSystem2.2 The Female ReproductiveSystem2.3 Gametogenesis2.4 Menstrual Cycle2.5 Fertilisation andImplantation2.6 Pregnancy and EmbryonicDevelopment2.7 Parturition and Lactation As you are aware, humans are sexually reproducing andviviparous. The reproductive events in humans includeformation of gametes (gametogenesis), i.e., sperms in malesand ovum in females, transfer of sperms into the femalegenital tract (insemination) and fusion of male…
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CHAPTER 2 SEXUAL REPRODUCTION INFLOWERING PLANTS
Read More: CHAPTER 2 SEXUAL REPRODUCTION INFLOWERING PLANTS1.1 Flower – A FascinatingOrgan of Angiosperms1.2 Pre-fertilisation : Structuresand Events1.3 Double Fertilisation1.4 Post-fertilisation: Structuresand Events1.5 Apomixis andPolyembryony Are we not lucky that plants reproduce sexually? Themyriads of flowers that we enjoy gazing at, the scents andthe perfumes that we swoon over, the rich colours thatattract us, are all there as an aid to sexual…
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CHAPTER 1REPRODUCTION IN ORGANISMS
Read More: CHAPTER 1REPRODUCTION IN ORGANISMS1.1 AsexualReproduction1.2 SexualReproduction Each and every organism can live only for a certain periodof time. The period from birth to the natural death of anorganism represents its life span. Life spans of a feworganisms are given in Figure 1.1. Several other organismsare drawn for which you should find out their life spansand write in the…