CBSE Class 12

CBSE Class 12 Biology — chapter-wise notes, questions and revision

Study Biology one chapter at a time with NCERT-aligned notes, sample questions and quick-revision points.

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About Class 12 Biology

Biology is part of the CBSE Class 12 syllabus. CBSERevision covers it chapter by chapter across 13 chapters. Each chapter page explains the NCERT chapter in student-friendly language, lists the key points to revise, and includes sample MCQs and questions with answers.

Class 12 Biology chapters

Open a chapter for notes, key points, sample questions and FAQs.

Chapter 1

Sexual Reproduction in Flowering Plants

This chapter explores the fascinating process of sexual reproduction in flowering plants, focusing on the unique structures and events that enable this vital biological…

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Chapter 2

Human Reproduction

This chapter explores the fascinating process of human reproduction, covering both male and female reproductive systems, gametogenesis, fertilization, pregnancy, and…

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Chapter 3

Reproductive Health

This chapter explores the concept of reproductive health, which encompasses the physical, emotional, behavioral, and social well-being related to reproduction.

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Chapter 4

Principles of Inheritance and Variation

This chapter explores the fundamental principles governing inheritance and variation in living organisms.

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Chapter 5

Molecular Basis of Inheritance

This chapter explores the molecular mechanisms underlying genetic inheritance.

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Chapter 6

Evolution

Evolution is the study of how life forms on Earth have changed over millions of years.

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Chapter 7

Human Health and Disease

This chapter explores the complex interplay between human health and various diseases, focusing on the mechanisms that maintain health and the factors that lead to…

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Chapter 8

Microbes in Human Welfare

This chapter explores the diverse and beneficial roles of microbes in human life.

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Chapter 9

Biotechnology: Principles and Processes

This chapter explores the fundamental principles and processes of biotechnology, focusing on genetic engineering and recombinant DNA technology.

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Chapter 10

Biotechnology and Its Applications

Biotechnology is a rapidly advancing field that combines biological science with technology to create useful products and processes.

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Chapter 11

Organisms and Populations

This chapter explores the fascinating world of ecology at the population level.

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Chapter 12

Ecosystem

An ecosystem is a functional unit of nature where living organisms interact with each other and their physical environment.

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Chapter 13

Biodiversity and Conservation

This chapter explores the rich diversity of life on Earth, known as biodiversity, and the urgent need for its conservation.

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Frequently asked questions

Is CBSERevision free for Class 12 Biology?

Yes — you can register and start studying Class 12 Biology notes and quizzes for free. Premium plans unlock unlimited quizzes, mock tests and more.

Is the Class 12 Biology content NCERT-aligned?

Every chapter page is written from the NCERT textbook chapter, so what you study matches what is taught in school.

How is Class 12 Biology organised on CBSERevision?

It is organised chapter by chapter into 13 chapters. Each chapter page gives a summary, key points for quick revision, sample MCQs and questions with answers, and frequently asked questions.

Can I practise questions for each chapter?

Each chapter page shows sample MCQs and questions with answers you can reveal. Creating a free account unlocks the full quiz, flashcards and practice sets for the chapter.

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