BodhiScoreWest Bengal Board Class 12 Biology Syllabus 2026-27
Exam scheme
Higher Secondary (Class 12), WBCHSE. Theory 70 + practical 30 = 100 marks. Semesters III and IV (Class XII portion).
Semester III (35 theory marks)
| Unit | Topic | Marks |
|---|---|---|
| VI | Reproduction — flowering plants, human reproduction, reproductive health | 15 |
| VII | Genetics and evolution — Mendelian genetics, molecular basis, evolution | 20 |
Chapters: Sexual reproduction in flowering plants; human reproduction; reproductive health; principles of inheritance; molecular basis of inheritance; evolution.
Semester IV (35 theory marks)
| Unit | Topic | Marks |
|---|---|---|
| VIII | Biology and human welfare — health, food production, microbes | 10 |
| IX | Biotechnology and applications | 12 |
| X | Ecology — organisms, ecosystems, biodiversity, environmental issues | 13 |
Practical (30 marks)
Major/minor experiments, slide preparation, spotting, record and investigatory project as listed in the official BIOS PDF (pollen germination, DNA isolation, pedigree charts, etc.).
Prescribed from WBCHSE Higher Secondary Syllabus SET I (July 2026).
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Original practice prompts
Use these with the official syllabus above—these are study prompts, not a claimed board question paper.
- Choose one listed section and explain its main ideas aloud without looking at notes.
- Write five questions you would ask from that section, then answer them from memory.
- Mark one topic you find difficult and make a one-page revision sheet for it.
- After revising, attempt a past or sample paper only if its board, subject, language, and year match yours.
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- Use the related materials below to revise the same subject.
- Check an answer key or marking scheme only when it is published by the board.