WBCHSE Class 12 Biology Syllabus 2025: The West Bengal Council of Higher Secondary Education (WBCHSE) has released the Class 12 Biological Science Syllabus for 2024-2025. The syllabus includes comprehensive details of the curriculum that students must cover in their final year. Biological Science, commonly referred to as biology, delves into the study of life and living organisms, including a broad range of topics such as structure, function, growth, evolution, and taxonomy.
This syllabus aims to equip students with an understanding of various life forms and biological processes. The subject is assessed over 100 marks, divided into theory and project work. This update provides students with the essential framework they need to excel in the academic year 2024-25.Check Detailed, WBCHSE Syllabus 2025, Download Subject-wise Syllabus
WBCHSE Class 12 Exam 2025 Overview | |
Particulars | Details |
Full Exam Name | West Bengal Higher Secondary School Certificate Examination |
Short Exam Name | West Bengal HSC Board 2025 |
Conducting Body | West Bengal State Board of Secondary and Higher Secondary Education, Pune |
Frequency of Conduct | Once a year |
Exam Level | Intermediate |
Languages | English, Hindi, Marathi |
Mode of Application | Offline |
Mode of Exam | Offline |
Exam Duration | 3 Hours |
West Bengal Class 12 Biology Syllabus 2025 | ||||
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Unit No. | Topics | Sub-Topics | Contact Hours | Marks |
Unit VI: Reproduction | ||||
Chapter 1: Sexual Reproduction in Flowering Plants | Flower structure, Development of male and female gametophytes, Pollination, Pollen-pistil interaction, Double fertilization, Seed and fruit development, Apomixis, Parthenocarpy, Polyembryony | 15 | 33 | |
Chapter 2: Human Reproduction | Male and female reproductive systems, Spermatogenesis and Oogenesis, Menstrual cycle, Fertilization, Embryo development, Pregnancy and lactation | 15 | ||
Chapter 3: Reproductive Health | Birth control, Contraception methods, Medical termination of pregnancy, Amniocentesis, Infertility, Assisted reproductive technologies (IVF, ZIFT, GIFT) | 3 | ||
Unit VII: Genetics and Evolution | ||||
Chapter 4: Principles of Inheritance and Variation | Mendelian inheritance, Deviations from Mendelism (Incomplete dominance, Co-dominance), Polygenic inheritance, Sex determination, Linkage and crossing over, Pedigree analysis, Chromosomal disorders | 20 | 57 | |
Chapter 5: Molecular Basis of Inheritance | DNA and RNA structure, DNA replication, Central dogma, Genetic code, Gene expression, Human genome project, DNA fingerprinting | 25 | ||
Chapter 6: Evolution | Origin of life, Evidence of biological evolution, Darwin’s theory, Natural selection, Hardy-Weinberg principle, Human evolution | 12 | ||
Unit VIII: Biology and Human Welfare | ||||
Chapter 7: Human Health and Diseases | Immune system, Antigen-antibody reaction, Pathogens, Human diseases (Malaria, Typhoid, AIDS, COVID), Cancer, Drug and alcohol abuse | 13 | 20 | |
Chapter 8: Improvement in Food Production | Plant breeding, Tissue culture, Single-cell protein | 2 | ||
Chapter 9: Microbes in Human Welfare | Microbes in food processing, Industrial production, Sewage treatment, Energy generation, Bio-control agents, Biofertilizers | 5 | ||
Unit IX: Biotechnology and Its Applications | ||||
Chapter 10: Biotechnology and Its Applications | Genetic engineering, Application of biotechnology in health and agriculture, Human insulin and vaccine production, Stem cell therapy, GMOs, Biopiracy | 15 | 15 | |
Unit X: Ecology and Environment | ||||
Chapter 11: Organisms and Populations | Habitat and niche, Population interactions, Population growth, Birth and death rates, Age distribution | 10 | 23 | |
Chapter 12: Ecosystem | Components of ecosystem, Energy flow, Ecological pyramids, Ecological succession | 5 | ||
Chapter 13: Biodiversity and Conservation | Importance of biodiversity, Loss of biodiversity, Conservation efforts, National Parks and Wildlife Sanctuaries | 4 | ||
Chapter 14: Environmental Issues | Solid waste management, Radioactive waste management, Environmental movements (Chipko, Silent Valley, Amrita Devi Bishnoi Movement) | 4 |
West Bengal Class 12 Biology Practical Syllabus | |
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Evaluation Scheme | Marks |
One major experiment | 6 |
One minor experiment | 5 |
Slide preparation | 3 |
Spotting (Three) | 6 |
Practical record + Viva voce | 5 |
Investigatory project viva voce | 5 |
WBCHSE Class 12 Biology Syllabus 2025 PDF