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CBSE Class 12 Science Biology Chapters

From learning about radioactive wastes and genetics to understanding food production and reproductive health, your Class 12 Science syllabus for Biology introduces you to a wealth of information. On TopperLearning, we have collated the most preferred learning resources for you to study and revise all the chapters in Biology with ease.

Take advantage of our NCERT Solutions for Class 12 Science Biology. Quickly revise questions and answers from your NCERT Biology Class 12 textbook. You may not have enough time to read every concept before the exam. That’s the reason, we have Most Important Questions (MIQs) compiled by experts to support you with last-minute revision.

If you would like to know how well you are prepared for the CBSE Class 12 Biology exam, evaluate your knowledge with our mock tests. To practise exam questions, you can go through our sample papers and previous year question papers. For additional help, utilise our ‘Ask The Expert’ feature to clear your doubts related to concepts from your CBSE Class 12 syllabus.

Biology is more theoretical than the other Science subjects in Class 12. Your Class 12 Biology marks are important for securing admission to pursue undergraduate courses in India’s most reputed colleges. Our NCERT Solutions for Class 12 Science Biology will help you manage a stress-free schedule as you master the theoretical concepts in Biology.

CBSE Class 12 Biology solutions for textbook questions, previous year papers, and sample papers can be useful in many ways. There are several objective-type questions and diagrams which can help you to score marks in your board exam. You can practise the solutions to correctly answer objective-type questions and also, you’ll know how to label diagrams accurately.

When you study the solutions to the different types of questions, you get clarity of the concepts. With conceptual clarity, you can write answers to theory questions in your own words. Don’t stress about your Class 12 Biology exam, just sincerely practise the Biology solutions as much as possible so that you are prepared to comfortably write your final exams.

CBSE Class 12-science Textbook Solutions, Videos, Sample Papers & More

Get the best answers for textbook questions with TopperLearning’s NCERT textbook solutions for CBSE Class 12 Biology. For example, find out the purpose of the ampulla of oviduct with our well-written textbook solutions for CBSE Class 12 Science Chapter Human Reproduction. Other than the textbook solutions, check the CBSE Sample Paper Class 12 solutions for assessing your confidence to answer questions from across the syllabus.

With our NCERT Solutions for Class 12 Science Biology, learn what is a Punnett square and what kind of analysis is Pedigree analysis. Understand how T.H. Morgan contributed to the study of genetics. The CBSE Class 12 Biology solutions to the textbook questions and sample paper questions are written by subject matter experts with excellent credentials. These experts review the latest exam guidelines, marking scheme, and CBSE Class 12 syllabus to provide accurate answers to various types of Biology questions.

Use TopperLearning’s ‘Ask The Expert’ to get your queries about the bagging technique for plant breeding programme or other Biology concepts. Revisit the details of important topics in CBSE Class 12 Science Biology with our videos and sample papers. The study resources are regularly reviewed and updated to ensure avoiding topics from the deleted syllabus of CBSE Class 12.


CBSE Class 12 Revision Notes

Revision Notes cover an in-depth explanation of topics from the CBSE Class 12 syllabus. We have put the notes in a chapter-wise format so that you can revise the chapters as per your study plan. With the revision notes, it will be easy for you to grasp complex theories covered in each chapter in your CBSE syllabus for Class 12.

Understand what animal husbandry is and why there is a need to learn about human reproduction. Get detailed answers to questions about greenhouse gases, radioactive wastes, aestivation, etc. The CBSE Online Class 12 revision notes will also guide you on how to explain the law of dominance using a monohybrid cross. Other than that, browse through the ‘Undoubt’ section of TopperLearning to revise solutions on perisperm, zygote, apomixis and more.

All the CBSE Class 12 Biology revision notes are available TopperLearning’s online study portal 24x7 and you can access them with a connected device anytime. Whether you want to revise the important questions in Physics with CBSE Sample Paper Class 12,  or need help with Maths exercises from the textbook, the required study material is within your reach on TopperLearning.


-          CBSE Class 12 Physics Revision Notes

-          CBSE Class 12 Biology Revision Notes

-          CBSE Class 12 Chemistry Revision Notes

-          CBSE Class 12 Maths Revision Notes

-          CBSE Class 12 Economics Revision Notes


CBSE Class 12 Textbook Solutions

If you are looking for correct answers from subject experts to get the most out of your NCERT book revision, use TopperLearning’s CBSE Class 12 Textbook Solutions. Read about pre-fertilization, post-fertilization and double fertilization in our CBSE Class 12 Science notes for Biology. Explore the basics of genetic engineering, human diseases, environmental issues, and more with the chapter-wise NCERT Solutions for Class 12 Science Biology on our study portal.

Revise the NCERT solutions for CBSE Class 12 to understand the difference between acquired immunity and innate immunity. Also, practise drawing important diagrams such as a well-labelled diagram of an antibody molecule and be prepared for your exam. Correct diagrams can help you score full marks in diagram-based questions and improve your overall board exam score. So, be thorough with the important diagrams included in your CBSE Class 12 syllabus.


TopperLearning not only offers NCERT Solutions for Class 12 Science Biology but also for other CBSE Class 12 subjects such as Physics, Maths, Chemistry, Economics, Accountancy, and Business Studies. Other than NCERT, you can find solutions for the TS Grewal textbook, HC Verma textbook, RD Sharma textbook and RS Aggarwal textbook on our online education portal.


-          NCERT Solutions for class 12

-          NCERT Solutions for Class 12 Maths

-          NCERT Solutions for Class 12 Physics

-          NCERT Solutions for Class 12 Chemistry

-          NCERT Solutions for Class 12 Biology

-          NCERT Solutions for Class 12 Economics

-          HC Verma Class 12 Physics Solutions

-          RD Sharma Class 12 Solutions


CBSE Sample Papers for Class 12

Revise questions from CBSE Class Science 12 Biology Sexual Reproduction in Flowering Plants and other chapters by using TopperLearning’s CBSE Sample Paper Class 12 during revision. Take a mock exam by attempting sample papers to get the confidence to write your final exam. You may have revised all the chapter individually with our revision notes, free textbook solutions and videos. But the real assessment of your exam-preparedness can be done through mock exams. Resources like CBSE Class 12 Maths sample papers 2020-21 can help you here.

Access our CBSE Class 12 Chemistry sample papers 2020-21 and sample papers on other subjects. Take the mock exams as these question papers are designed as per your exam paper structure and marking scheme. Our experts have provided solutions to these question papers to enable you to assess the attempted question papers easily. As per your time commitment, schedule these mock exams multiple times to improve your final score.

For specific doubts, explore our CBSE Online Class 12 doubts and solutions section or ask for support from experts using the ‘Ask The Expert’ platform. Download and use our CBSE Class 12 Physics sample papers 2020-21, Chemistry, Mathematics and Biology for CBSE Class 12 as many times as you want for exam preparation.


-          CBSE Class 12 Sample Paper for Physics

-          CBSE Class 12 Sample Paper for Chemistry

-          CBSE Class 12 Sample Paper for Biology

-          CBSE Class 12 Sample Paper for Maths


Previous Year Question Papers for CBSE Class 12

CBSE Online Class 12 Previous Year Question Papers for Physics, Maths, Chemistry and Biology are the best resources to get a feel of the actual exam. Use these question papers to take timed mock tests. You may have revised all your lessons but there is more to exam preparation than just revising chapter concepts. If you know the right answer but you don’t attempt it due to lack of time, it will impact your exam performance. Or you may even attempt the question but write an incorrect answer while trying to complete writing the answers on time.

With TopperLearning’s CBSE Previous Year Question Papers for Class 12, you can set the duration for a mock exam as per the duration of your actual exam and attempt the questions. The self-assessment after this exercise will allow you to identify the type of questions that you need more time to answer. Based on the analysis of the mock exams, attempt the question paper again with a strategy to manage time. This exercise will help you to write answers correctly in your board exam and finish the paper on time.

Also, with proper planning, you will get extra time to recheck the answers in your question paper. So, prepare for your board examination with TopperLearning’s CBSE Class 12 Previous Year Questions Papers for Maths, Physics, Chemistry and Biology. Also, explore our CBSE Sample Paper Class 12.


-          CBSE Previous Year Question Papers for Class 12 Maths

-          CBSE Previous Year Question Papers for Class 12 Physics

-          CBSE Previous Year Question Papers for Class 12 Chemistry

-          CBSE Previous Year Question Papers for Class 12 Biology


CBSE Class 12 Videos

Understand concepts from your CBSE syllabus for Class 12 with engaging videos. In TopperLearning’s CBSE Class 12 Videos, you will find subject experts explaining the concepts in a lucid format. Some of the concepts in Science are explained with illustrative animation clips and experiments. You may have read a lot and revised concepts through writing practice. However, sometimes, just watching a video of the concept is more effective.

You may have to watch the video a couple of times and grasp the concept before you can explain the concept in your own words. Once you have conceptual clarity, you can go back to the free textbook solutions, CBSE Sample Paper Class 12 solutions, revision notes, etc. By comparing your answers with the answers by subject experts, you can identify the missing points that you need to include in your answers during exams.

And if there are still difficulties in understanding certain complex topics, our ‘Ask The Expert’ can help you with easy answers. You can also check our CBSE Online Class 12 Doubts and Solutions section for polishing your knowledge of concepts with the resolved doubts of other students.


CBSE Class 12 Science Videos

CBSE Class 12 Science Biology Videos

CBSE Class 12 Science Physics Videos

CBSE Class 12 Science Chemistry Videos

CBSE Class 12 Science Mathematics videos

CBSE Class 12 Science Biology: MIQs, MCQs, Subjective Questions

When you sit to review your board exam preparation, there are several study tools to help you. Start with an online practice test for each chapter and identify the chapters wherein you get the lowest score. Revisit the topics from these chapters with TopperLearning’s CBSE Class 12 Science Biology MIQs, MCQs and subjective questions.

CBSE Class 12 Science Biology MIQs

Get the most important questions for Biology as per the CBSE syllabus for Class 12 at TopperLearning. Learn why amniocentesis, the technique for determining the sex of a developing foetus, is banned in the country. Become aware of the methods that help infertile couples have children with the Biology lessons taught per your CBSE Class 12 syllabus. In our CBSE Online Class 12 MIQs, you will come across important questions and answers that are beneficial for last-minute quick revision before your board examination.

- CBSE Class 12 Biology MIQs

CBSE Class 12 Physics MIQs

CBSE Class 12 Chemistry MIQs

CBSE Class 12 Maths MIQs

CBSE Class 12 Science Biology MCQs

MCQs are a collection of objective type questions where each question may carry 1 or 2 marks but will impact your overall score. When you prepare for your CBSE Class 12 Biology board exam, each question, whether an MCQ or a long answer type question, is important. The marks for CBSE Class 12 Science Biology MCQs will add up to help you secure a top score in your final exam. And this overall score will benefit you for gaining admissions to higher education pursuits in the field of Science.

- CBSE Class 12 Biology MCQs

- CBSE Class 12 Physics MCQs

- CBSE Class 12 Chemistry MCQs

- CBSE Class 12 Maths MCQs

CBSE Class 12 Science Biology Subjective Questions

Complete your revision of CBSE Class 12 Science Biology concepts with our wide collection of e-learning resources. Thoroughly revise the entire syllabus by practising concepts like interspecific competition, parasitism, angiosperm ovule, logistic population growth curve, etc. with our CBSE Class 12 Biology subjective questions and other online revision materials. With accurate answers to subjective questions, you will be able to understand what to write and how much to write to get maximum marks in a given question.

- CBSE Class 12 Biology Subjective Questions

- CBSE Class 12 Physics Subjective Questions

- CBSE Class 12 Chemistry Subjective Questions

- CBSE Class 12 Maths Subjective Questions

CBSE Class 12 Science Biology Practice Tests

So, you have studied as much as you can for your board exam. Doubts are lurking around and you are unsure which topics to focus on. Take the CBSE Class 12 Science Biology Practice Tests to evaluate your topic knowledge. The self-assessment results after taking these online tests will help you with revision. You can check whether your knowledge of biotechnology needs to be improved or other syllabus topics.

-CBSE Class 12 Biology Practise Tests

-CBSE Class 12 Physics Practise Tests

-CBSE Class 12 Chemistry Practise Tests

-CBSE Class 12 Maths Practise Tests


CBSE Class 12-science Biology Frequently Asked Questions

All chapters of class 12-science Biology CBSE, in the prescribed syllabus by the CBSE and based on the NCERT curriculum have their importance and weightage. TopperLearning have taken into consideration all minute details from the curriculum to ensure that the syllabus of class 12-science Biology CBSE is aligned properly. Each chapter of class 12-science Biology CBSE has various concepts that are aligned to the NCERT Learning outcomes and plays a specific role in improving outcomes. CBSE class 12-science Biology chapter list will give you an idea of the entire course curriculum coverage.
To start with Class 12-science Biology CBSE, one should clearly understand the syllabus and course structure first. Teachers will help giving an introduction and of the syllabus and ways it will help them to improve their learning levels. Once a learner slowly understands the concepts, it is recommended to initiate practice a habit. ToppeLearning can aid students to practice with tests and do a quick revision of the concepts learnt in the class with important resources like Video lessons, notes and sample papers. Practicing and revising all these resources from initial will help them understand the concepts with clarity. Nowadays, the questions are asked keeping in mind the problem solving and applications of concepts into consideration. Always try to clear the concepts of Class 12-science Biology CBSE that you do not understand. Avoid skipping topics or concepts. Revise crucial topics watching concept and problem solving videos at TopperLearning after your school or online classes or as required.
To score good marks in Biology Class 12-science CBSE, one needs to understand the concepts really well. If a learner is well aware of the core concepts then it becomes very easy to attempt problems asked on those concepts. This also motivates learners to gain knowledge and excel in studies. Once a learner has understood the concepts in Biology Class 12-science CBSE then practice should become a daily ritual as it is the key to let know about strengths and weaknesses. For subjects like Maths, practice is the key. For Science, knowing how to apply a learnt concept into daily life and problem solving is crucial. Once a learner is able to know what is happening around, can relate to the theories learnt in the books. Writing answers is also a good habit as it strengthens your communication skills and keeps a check on areas to improve which will enable scoring good marks in exams. Keep revising crucial topics watching concept and problem solving videos at TopperLearning after your school or online classes or as required.
Some students consider Class 12-science Biology chapters as interesting than maths chapters. Actually, the interests vary from student to student as some like History chapters than Class 12-science Biology. It is very evident that most students who like Maths, chapters related to Algebra, Percentages, Profit and Loss, Trigonometry, etc. interested the most. Students who have planned for various scholarships, Olympiads or competitive exams mostly find chapters related to metals and non-metals, acids and bases, light, energy, work, power, etc. In Social Biology, students mostly find interests in stone and Iron Age history, about the medieval age, world history and India’s struggle for independence, etc. At TopperLearning you will get access to the bank of resources in the form of videos, notes, a huge question bank, Class 12-science Biology NCERT solutions etc., which will help you gain knowledge on the chapters that interest you the most. Just make sure to go through the TopperLearning Plans for your board-grade combination.

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