NCERT Books for Class 12 Biology: National Council of Educational Research and Training (NCERT) publishes the NCERT class 12 Biology books that are planned under the National Curriculum Framework (NCF). Most of the CBSE and State Boards follow these books and syllabus. NCERT textbook for class 12th biology include all topics and chapters that are covered in CBSE class 12 Syllabus for Biology in the simplest manner. Biology is a theoretical subject and seems easier than physics and chemistry. But this subject needs to be prepared carefully as well, as it is very scoring. Hence, students are advised to read from NCERT Books for Class 12 Biology to study the subject and clear all the basics first. Moreover, questions in CBSE Class 12th board exams, KVPY scholarship exam, NEET entrance exam, etc are generally asked from the NCERT Science books class 12. Students can also refer to NCERT exemplar class 12 biology book pdf for better preparation. Read the article to know how to download NCERT books for Class 12 Biology online for free, syllabus and marking scheme.

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NCERT Books for Class 12 Biology

Download Free NCERT Books for Class 12 Biology pdf

Check the given steps to download NCERT Biology books for class 12th online :

  • Click on the respective chapter link or visit the official website

  • Select the respective class and subject.

  • A pdf file will open on your screen.

  • Now, click on the arrow given above to download the pdf file of NCERT Class 12 Biology book free of cost.

NCERT 12th Class Biology Books Online: Steps to Download for free

NCERT has started the provision to buy the books online for the comfort of students. To buy the same, follow these steps :

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  • Visit the official website of NCERT, to buy the Class 12 Biology Books online.

  • Register online by providing the basic info. before placing the order.

  • Now, Click on the link "order textbooks online" and add the NCERT Books for Class 12 Biology in the cart.

  • Click on the option “proceed to payment” for paying the amount using a credit card, debit card or net banking through online mode.

NCERT Book for Class 12 Biology

This book of NCERT Class 12 biology is prescribed in most of the CBSE board schools and hence it gives relevant information about the respective subject. Chapter-wise links of NCERT Biology book are tabulated below:

Human Ecology And Family Sciences Part - I

Below mentioned is another NCERT Books for Class 12 Biology which is not prescribed by CBSE but some of the schools refer this book for Class 12th. Human Ecology and Family Sciences (HEFS) is framed to broaden student’s knowledge regarding self-development in relation to family and society. Chapter-wise links of this book are discussed below:

Biology Class 12 Syllabus and Marking Scheme:

We have discussed in detail about the Class 12th Biology exam structure, syllabus and marking scheme which will help students understand the pattern of the exam and help them prepare well.








Genetics and Evolution



Biology and Human Welfare










Students are advised to be aware of the NCERT syllabus and marking scheme of all the other Class 12th subjects to prepare well and in a definite pattern. Also, read:

Unit VI - Reproduction:

The first unit of NCERT Books for Class 12 Biology is Reproduction. This unit is further differentiated into several chapters namely - Reproduction in human beings, Reproduction in flowering plants, Human Reproduction and Reproductive health. This unit acts as a huge importance to score well in the class 12th board exams as it holds 14 marks out of 70. Students are advised to prepare this unit using a lot of diagrammatic representation. This will help them to understand the details clearly.

Unit VII - Genetics And Evolution

The Genetics and Evolution unit contains several chapters namely - Principles of Inheritance and Variation, Molecular Basis of Inheritance, and Evolution. Students should prepare well by using diagrams along with a theoretical explanation. This unit involves some concepts which will be clear if studied carefully. Students are also suggested to make short notes of various topics while preparation of the exams. This unit is important as it carries 18 marks out of 70 in class 12th biology board exams.

Unit VIII - Biology in Human Welfare

NCERT Books for Class 12 Biology take into account this unit and further distribute the same into chapters such as - Human Health and Diseases, Strategies for Enhancement in Food Production and Microbes in Human Welfare. These chapters include a lot of theoretical information. Students are advised to highlight important details to remember every important point. This unit holds 14 marks and can be prepared in less time. Thus, students are suggested to prepare this unit well to score high.

Unit IX - Biotechnology

This unit involves theory and simple details about Biotechnology and its application. Biotechnology is further divided into two chapters such as - Biotechnology: Principles and Processes and Biotechnology and its Applications. It carries 10 marks out of 70. Students are advised referring to NCERT Biology books for class 12 to clear their concepts. It is advised to make personal notes for better preparation.

Unit X - Ecology

Ecology is the last unit, which is included in the NCERT Books for Class 12 Biology. It involves several chapters like Organism and Population, Ecosystem, Biodiversity and Conservation and Environmental Issues. This unit holds 14 marks out of 70 and should be prepared using flowcharts. Using flowcharts will help the students to remember every detail which will add to their high score.

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CBSE Class 12th Updates and Articles

Questions related to CBSE Class 12th

Showing 40 out of 40 Questions

may i know the exam date of history 315 sr.secondary

Manish Singh 25th Mar, 2020

After the cancellation of the open board 12th class examination till 31st March, a new date sheet has been announced by the National institute for Open Schooling on its official website. According to it the  exam date for History 315 for class 12 is 9th April


12 compartment student take admission in any college of after complete compartment exam.

Soham sengupta 19th Mar, 2020


actually it is not possible to take admission in any college of BTech after just completing your 10 + 2 compartment exam. You have to  give the exam of of any joint entrance examination for  engineering or similar like this. You have to pass on this examination and if you have a good rank you can take admission in good colleges. Don't worry if you have not a good rank you can take admission in private colleges also with low ranks also.

Hope this will help you.


Im fail in 12 last year. in this year Im private candidate of cbse 2020 . if i fail in one subject. can i give compartment exam

Rehan Alam Student Expert 17th Mar, 2020

Dear Aspirant,

Compartment is an extra chance to appear for the exam which you might not be able to qualify in the first time. Compartment is given if you are fail in only one subject, so yes if you fail in one subject then you're allowed to give compartment, however, if you have fail in more than one subject, then it is considered as fail.

Hope this helps. Thank you.


goodevening, I Ajaykumar, What if I got failed in 2 subjects out six subjects. will i get compartment!

Neha Kanwar 13th Mar, 2020

Hello Ajay,

Yes this is true that if you fail in any of your subject you get compartment and have to reappear for the examination.

As per your query you asked if you failed in 2 out of 6 subjects so it is not about 2 subjects if you fail in even one subject then you have to give the exam again to clear it out.

Good Luck !


cbse class 12th ki compartment ki marksheet pe all (5) subjects ke marks appear (printed) hoge ya fir .only jis subject mai compartment di hai usi 1 subject ke marks printed aayege?

Yash Dev Student Expert 8th Mar, 2020
Hello student on the compartment result only one or number of compartment exam results are printed not all results will be printed like normal results.
Rest of the results are printed on your board examination original marksheet.
(if you've given compartment examination in only one subject then only that one subject results will be published).

Feel free to comment if you have any doubt
Good luck
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