XII Class 12 Biology Unit VIReproduction Chapter 1 : Reproduction in OrganismsChapter 2 : Sexual Reproduction in Flowering PlantsChapter 3 : Human ReproductionChapter 4 : Reproductive Health Unit VIIGenetics and Evolution Chapter 5 : Principles of Inheritance and VariationChapter 6 : Molecular Basis of InheritanceChapter 7 : Evolution Unit VIIIBiology in Human Welfare Chapter 8 : Human Health and DiseaseChapter 9 : Strategies for Enhancement in Food ProductionChapter 10 : Microbes in Human Welfare Unit IXBiotechnology Chapter 11 : Biotechnology : Principles and ProcessesChapter 12 : Biotechnology and Its Applications Unit XEcology Chapter 13 : Organisms and PopulationsChapter 14 : EcosystemChapter 15 : Biodiversity and ConservationChapter 16 : Environmental Issues