# CBSE Class 12 Biology: Chapters and Notes | SwaVid

All 13 NCERT Class 12 Biology chapters in book order, CBSE unit marks out of 70, and free chapter notes with key ideas and quick checks.

Canonical: https://www.swavid.com/cbse/class-12/biology/chapters

Source: https://www.swavid.com/cbse/class-12/biology/chapters

# Class 12 Biology

## Marks for each unit

## All 13 chapters

## Questions parents ask

## Class 12 Biology on SwaVid

SwaVid › CBSE › Class 12 › Biology

All 13 NCERT chapters , CBSE unit marks and free chapter notes.

CBSE prints marks for each unit. It does not print marks for chapters inside a unit. The unit for each chapter follows the unit headings in the NCERT contents.

Short answer. Class 12 Biology has 13 NCERT chapters in one book . The CBSE theory paper is 70 marks and 3 hours , with 30 marks for the practical .

CBSE prints marks for each unit. It does not print marks for chapters inside a unit. The unit for each chapter follows the unit headings in the NCERT contents.

Source: CBSE Curriculum 2026-27, Biology (044), Classes XI-XII , p.9

The NCERT Class 12 Biology chapters, in book order. Tap a chapter for its notes.

Source: NCERT textbooks, Reprint 2026-27, at ncert.nic.in

The notes are written by SwaVid from the NCERT textbook. They are not CBSE material.

The NCERT books list 13 chapters for Class 12 Biology that this page covers. NCERT Biology has 13.

CBSE does not give marks to a single chapter. It prints marks for each unit or part, for example 16 marks for Unit VI: Reproduction.

No. They are written by SwaVid from the NCERT textbook. The CBSE curriculum is the reference for what is assessed.

SwaVid is an AI tutor for Indian students in Classes 6 to 12. It finds the earlier ideas a child missed, then teaches today’s chapter. Start free to see how it works.

- 13 chapters
- 70 marks theory
- 30 practical

## Key Links

- [CBSE](https://www.swavid.com/cbse)
- [Class 12](https://www.swavid.com/cbse/class-12)
- [Biology](https://www.swavid.com/cbse/class-12/biology)
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- [CBSE Curriculum 2026-27, Biology (044), Classes XI-XII](https://cbseacademic.nic.in/web_material/CurriculumMain27/SecPart2/Biology_SecP2_2026-27.pdf)
- [Sexual Reproduction in Flowering Plants](https://www.swavid.com/cbse/class-12/biology/chapter/sexual-reproduction-in-flowering-plants)
- [Human Reproduction](https://www.swavid.com/cbse/class-12/biology/chapter/human-reproduction)
- [Reproductive Health](https://www.swavid.com/cbse/class-12/biology/chapter/reproductive-health)
- [Principles of Inheritance and Variation](https://www.swavid.com/cbse/class-12/biology/chapter/principles-of-inheritance-and-variation)
- [Molecular Basis of Inheritance](https://www.swavid.com/cbse/class-12/biology/chapter/molecular-basis-of-inheritance)
- [Evolution](https://www.swavid.com/cbse/class-12/biology/chapter/evolution)
- [Human Health and Disease](https://www.swavid.com/cbse/class-12/biology/chapter/human-health-and-disease)
- [Microbes in Human Welfare](https://www.swavid.com/cbse/class-12/biology/chapter/microbes-in-human-welfare)
- [Biotechnology: Principles and Processes](https://www.swavid.com/cbse/class-12/biology/chapter/biotechnology-principles-and-processes)
- [Biotechnology and its Applications](https://www.swavid.com/cbse/class-12/biology/chapter/biotechnology-and-its-applications)
- [Organisms and Populations](https://www.swavid.com/cbse/class-12/biology/chapter/organisms-and-populations)
- [Ecosystem](https://www.swavid.com/cbse/class-12/biology/chapter/ecosystem)
- [Biodiversity and Conservation](https://www.swavid.com/cbse/class-12/biology/chapter/biodiversity-and-conservation)
- [ncert.nic.in](https://ncert.nic.in/textbook.php)
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