BodhiScoreAssam Board Class 12 Biology Syllabus 2026-27
Exam scheme
Higher Secondary Final year (Class 12), AHSEC. Theory 70 + practical 30 = 100 marks. Time: 3 hours.
| Group | Unit | Marks |
|---|---|---|
| Botany | Sexual reproduction | 8 |
| Botany | Genetics and evolution | 12 |
| Botany | Biology in human welfare | 5 |
| Botany | Biotechnology | 1 |
| Botany | Ecology (incl. compulsory from Ch. 14) | 9 |
| Zoology | Reproduction | 20 |
| Zoology | Genetics and evolution | 35 |
| Zoology | Biology in human welfare | 12 |
| Zoology | Biotechnology (transgenic animals) | 1 |
| Zoology | Ecology (incl. compulsory from Ch. 14) | 9 |
Chapters (summary)
- Sexual reproduction in flowering plants
- Human reproduction
- Reproductive health
- Principles of inheritance and variation
- Molecular basis of inheritance
- Evolution
- Human health and diseases
- Microbes in human welfare
- Biotechnology — principles and processes
- Biotechnology and its applications
- Organisms and populations
- Ecosystems
- Biodiversity and conservation (incl. Assam national parks)
- Bioresources of Assam (medicinal and timber plants; Muga/Eri sericulture)
Practical
Botany practical 15 marks; zoology practical 15 marks — flower/pollen studies, mitosis/meiosis slides, soil and population ecology, animal specimens, record book.
Recommended textbooks: NCERT Biology; AHSEC Jib Bigyan (Assamese medium).
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