CBSE · Class 12 · Session 2026-27
CBSE Class 12 Biology — Notes, Videos, PYQ सीबीएसई कक्षा 12 जीव विज्ञान
The CBSE Class 12 Biology theory paper carries 70 marks (practical 30). Unit-wise weightage: Reproduction 16, Genetics & Evolution 20, Biology & Human Welfare 12, Biotechnology 12, Ecology 10 — given below alongside each unit.
All 13 chapters are from the current NCERT Biology textbook (2026-27).
⏱ Mock testTimed, full syllabus, instant resultCBSE previous year papersOfficial CBSE question-paper page link
Chapters (CBSE 2026-27)
Unit 6: Reproduction 16 marks (CBSE)
- 1Sexual Reproduction in Flowering Plantsपुष्पी पादपों में लैंगिक प्रजनन
- 2Human Reproductionमानव जनन
- 3Reproductive Healthजनन स्वास्थ्य
Unit 7: Genetics and Evolution 20 marks (CBSE)
- 4Principles of Inheritance and Variationवंशागति तथा विविधता के सिद्धांत
- 5Molecular Basis of Inheritanceवंशागति के आणविक आधार
- 6Evolutionविकास
Unit 8: Biology and Human Welfare 12 marks (CBSE)
Unit 9: Biotechnology 12 marks (CBSE)
- 9Biotechnology: Principles and Processesजैव प्रौद्योगिकी : सिद्धांत व प्रक्रम
- 10Biotechnology and its Applicationsजैव प्रौद्योगिकी एवं उसके उपयोग
Unit 10: Ecology 10 marks (CBSE)
- 11Organisms and Populationsजीव और समष्टियाँ
- 12Ecosystemपारितंत्र
- 13Biodiversity and Conservationजैव विविधता एवं संरक्षण
Official CBSE resources
- CBSE Curriculum 2026-27 (official)
- CBSE previous years' question papers (official)
- NCERT Biology textbook (official)
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