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CBSE Class 12 science Biology

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.

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CBSE Class 12 Science Biology Chapters

CBSE Class 12 Science Biology Chapter Reproduction in Organisms

Study CBSE Class 12 Science Biology Reproduction in Organisms with TopperLearning’s study material like CBSE Sample Paper Class 12. In the chapter resources, our experts explain the importance of reproduction. Which offspring is more resilient, the one produced through sexual reproduction or the one produced through asexual reproduction? The answers can be found in the NCERT solutions for Class 12 Science Biology.

For queries on CBSE Class 12 Science Biology Reproduction in Organisms, request answers from subject experts via the ‘Ask The Expert’ platform. Clarify your doubts on the Juvenile phase, vegetative propagation, and other chapter concepts. For already answered questions, check the ‘Undoubt’ section on TopperLearning.


CBSE Class 12 Science Biology Chapter Sexual Reproduction in Flowering Plants

Understand how megasporogenesis is different from microsporogenesis, with our study resources for CBSE Class 12 Science Biology Sexual Reproduction in Flowering Plants. With the Biology solutions, learn from experts how to correctly draw a labelled diagram of an angiosperm ovule or a female gametophyte. Also, learn to explain concepts with the help of diagrams by revising the chapter solutions thoroughly.

The reference materials for topics from the deleted syllabus of CBSE Class 12 are removed from our study portal. We make sure that you are equipped with learning resources for all the latest CBSE Class 12 syllabus topics. Learn better with our updated chapter resources for CBSE Class 12 Science Biology Sexual Reproduction in Flowering Plants.


CBSE Class 12 Science Biology Chapter Human Reproduction

Prepare for questions from CBSE Class 12 Science Biology Human Reproduction with the extensive study materials available from TopperLearning. If you are unsure about the significance of Luteinizing Hormone, use our ‘Ask The Expert’ feature to gain clarity from subject experts. Revise important Biology concepts with study materials such as videos, free textbook solutions, CBSE Sample Paper Class 12, and more.

Some of the important topics covered in this CBSE Class 12 Biology chapter include haploid, viviparous, blastocyst, placenta, and more. Revise these CBSE Class 12 Science Biology Human Reproduction topics while practising the textbook solutions or while watching chapter videos. There are several resources for all the topics except the ones from the deleted syllabus of CBSE Class 12, to support your revision.

 

CBSE Class 12 Science Biology Chapter Reproductive Health

Get all the online study material required to revise the CBSE Class 12 Science Biology Reproductive Health on TopperLearning. Understand why the physical and emotional well-being of a person is important for good reproductive health. The CBSE Class 12 syllabus also covers information on sexually transmitted diseases and the preventive measures for the same. Using the chapter notes, videos, and learning material, our subject experts help you complete the required topic revision for your exam.

Through this chapter in the CBSE Class 12 syllabus, sex education is imparted to students. Understand population explosion and the role played by contraceptives in population control in the NCERT solutions for CBSE Class 12 Science Biology Reproductive Health.

 

CBSE Class 12 Science Biology Chapter Principles of Inheritance and Variation

What does it mean when we say that a child has inherited certain qualities of a parent? Why is the study of inheritance important? The answers to such questions can be found in our notes and learning resources for CBSE Class 12 Science Biology Principles of Inheritance and Variation. Revisit the explanation of Mendel’s pea plant experiment and how choosing a pea plant helped in gaining insights on cross-pollination and self-pollination in plants. Understand what is a dominant trait and when does a recessive trait show up.

Practise our NCERT Solutions for Class 12 Science Biology and learn to explain diagrams such as the diagram of a Diploid organism or a test cross. Our doubts and solutions for Biology will come in handy to clarify doubts from CBSE Class 12 Science Biology Principles of Inheritance and Variation. You can also post your questions to subject experts through TopperLearning’s ‘Ask The Expert’ platform, and get the required clarifications.


CBSE Class 12 Science Biology Chapter Molecular Basis of Inheritance

Dive deeper into the topic of inheritance with our e-learning resources for CBSE Class 12 Science Biology Molecular Basis of Inheritance. You may have heard about human genome sequencing but understand what it is exactly by revising with the free textbook solutions on TopperLearning. This chapter educates you on the nature of RNA and DNA templates.

In the CBSE Class 12 Science Biology Molecular Basis of Inheritance chapter, learn how RNA is different from DNA and the different sequence formations of RNA and DNA. Our subject experts have clearly explained these concepts in our NCERT Solutions for Class 12 Science Biology, CBSE Class 12 Biology videos, and other resources. Revise the functions of exons and tRNA with our chapter notes. Practise questions based on chapter concepts through our CBSE Sample Papers Class 12, previous years’ question paper solutions, online practice tests, and more.

 

CBSE Class 12 Science Biology Chapter EvolutionEnhance your understanding of concepts included in CBSE Class 12 Science Biology Evolution with TopperLearning’s study material. Brush up your knowledge of the Darwinian selection theory with our NCERT solutions for CBSE Class 12. Discover amazing facts about fossils and how they help the study of evolution. Use our textbook solutions to understand how different parts of the human body such as the human brain, the body posture, etc. have gone through the process of evolution.

Understand humans' food habits and features in different evolution stages such as Homo erectus, Ramapithecus, Homo sapiens sapiens, etc. Also, study the Most Important Questions Doubts and Solutions CBSE Class 12 Biology to revise questions from CBSE Class 12 Science Biology Evolution chapter that are likely to come in your exam. For doubts and clarifications, visit the ‘Undoubt’ section of our study portal.

 

CBSE Class 12 Science Biology Chapter Human Health and Disease

Benefit from the online learning resources for CBSE Class 12 Science Biology Human Health and Disease available on our study portal. In the NCERT solutions for CBSE Class 12 for this chapter, find details of the preventive measures taken to prevent the spread of infectious diseases. Learn about isolation, vector eradication, vaccination, and hygiene standards that are followed to monitor and control the spread of diseases.

The CBSE Class 12 Biology free textbook solutions include answers on how diseases like pneumonia, malaria, and amoebiasis are transmitted. In the study material, you can also find the full form of important abbreviations such as NACO, MALT, AIDS, etc. Revise CBSE Class 12 Science Biology Human Health and Disease chapter concepts easily with the readily available online study materials on TopperLearning.

 

CBSE Class 12 Science Biology Chapter Strategies for Enhancement in Food Production

Revise CBSE Class 12 Science Biology Strategies for Enhancement in Food Production concepts with TopperLearning’s online learning resources. Is ventilation important in the housing of dairy-producing animals? Read the CBSE Class 12 Biology textbook solutions to understand the role of animal husbandry for humans. Get to know the natural and artificial methods of breeding animals.

Practise the NCERT solutions CBSE Class 12 Biology to understand the features of fish farming, apiculture, plant breeding, and more. Revise topics like biofortification, micropropagation, and more through our notes on CBSE Class 12 Science Biology Strategies for Enhancement in Food Production. This chapter aims to make you aware of the various types of activities such as animal husbandry and the benefits of the same from a commercial perspective.

 

CBSE Class 12 Science Biology Chapter Microbes in Human Welfare

Study for your board exam with our reliable learning material for CBSE Class 12 Science Biology Microbes in Human Welfare revision. Discover the world of bacteria – the good ones and the ones that are bad for us. Can you see them? How? Find out more in the textbook solutions. Learn how bacteria are part of the foods that we consume and revise the functions of good bacteria.

Again, while learning about a fungus, find out how certain types of fungi are used for making antibiotics that treat us. Read and grasp all about the microbes that benefit us with the CBSE Class 12 Science Biology Microbes in Human Welfare study material. Also, understand how to write about the various applications of microbes in your CBSE Class 12 Biology exam with well-written answers by subject experts.


CBSE Class 12 Science Biology Chapter Biotechnology: Principles and Processes

Revise CBSE Class 12 Science Biology Biotechnology: Principles and Processes lessons with the rich repository of study material on TopperLearning. Take a look at the textbook solutions to understand how the transgenic bacteria looks like and how to explain the concept in your board exam by creating a diagram. Sometimes, crops are genetically modified to enhance their properties but there can be disadvantages too. Learn the advantages and disadvantages of these crops in our NCERT Solutions for Class 12 Science Biology.

Revise CBSE Class 12 Biology chapter concepts such as Cry proteins, gene therapy, golden rice, and more. Revise the interesting scientific research and activities in the field of Biotechnology with our NCERT solutions for CBSE Class 12, videos, and other e-learning resources. After learning the concepts from CBSE Class 12 Science Biology Biotechnology: Principles and Processes, you can explore further by pursuing higher education in the field of genetic engineering.

 

CBSE Class 12 Science Biology Chapter Biotechnology and its Applications

Revisit the topics from CBSE Class 12 Science Biology Biotechnology and its Applications using revision notes, videos, and other resources on TopperLearning. Understand why the field of Biotechnology is important in Science by learning the biotechnological applications in detail in this chapter. Our textbook solutions cover answers to questions about genetically modified crops, bioremediation and other solutions. Read the NCERT solutions for CBSE Class 12 for this chapter to understand how certain superfoods are created with essential nutrients.

With the study material for CBSE Class 12 Science Biology Biotechnology and its Applications, learn about the ethical issues related to research fields such as cloning. Also, understand how biotechnology helps in the production of energy and chemical fertilizers. You can further practise the questions from this CBSE Class 12 Biology chapter through the CBSE Sample Paper Class 12 solutions and previous years’ paper solutions.

  

CBSE Class 12 Science Biology Chapter Organisms and Populations

Get the complete learning and self-assessment tools by revising CBSE Class 12 Science Biology Organisms and Populations on TopperLearning. Can the birth rate and the mortality rate of the population of a specific geographic location be different from that of another location? Get your answers in the NCERT solutions for Class 12 Science Biology of this chapter. Not just that, get a deeper understanding of sex ratio, age distribution, and population density with our textbook solutions.

Do you know some plants contain poisonous chemicals which they use as defence mechanisms to protect themselves from herbivores? Yes, that’s true. Read about such facts and more in our CBSE Class 12 Science Biology Organisms and Populations notes. For your board examination, learn how to explain concepts such as endotherms, hibernation, mutualism, commensalism, etc. with TopperLearning’s CBSE Online Class 12 study material created by subject experts.

 

CBSE Class 12 Science Biology Chapter Ecosystem

Aim for the best preparation for your board exam by studying from TopperLearning’s CBSE Class 12 Science Biology Ecosystem e-learning materials. Learn what are autotrophs and how does the food chain work. Where are humans placed in the food chain and what are the various levels of the food chain? Study the CBSE Class 12 Biology chapter notes to revise the features of decomposers, producers, zooplankton, etc.

Understand the difference between litter and detritus with TopperLearning’s CBSE Class 12 Science Biology Ecosystem revision notes. Get clarity on chapter topics such as decomposition, inverted pyramid, food web, and others with our study material. For exam readiness, you can gain 24x7 access to our online learning resources – CBSE Sample Paper Class 12, previous years’ question paper solutions, ‘Undoubt’ platform queries and solutions, and more.

 

CBSE Class 12 Science Biology Chapter Biodiversity and Conservation

To revise CBSE Class 12 Science Biology Biodiversity and Conservation topics, refer to TopperLearning’s online study material. Revise what is species diversity and how it is different from ecosystem diversity and genetic diversity. Use our revision notes to understand why species are extinct in certain geographic regions. Our subject experts have explained the significance of biodiversity through detailed answers.

With the CBSE Class 12, Science Biology Biodiversity and Conservation notes from TopperLearning, you will learn how to answer different types of questions and how to participate in conservation efforts. Learn why sacred groves exist and why there are efforts put in to make certain species extinct. For doubts, you can head to the ‘Ask The Expert’ section of TopperLearning where experts from the field will respond to your queries.

 

CBSE Class 12 Science Biology Chapter Environmental Issues

Ensure a thorough preparation for various types of questions from CBSE Class 12 Science Biology Environmental Issues in your board exam with TopperLearning’s study resources. Find out what constitutes domestic sewage. Revise the textbook solutions to understand how domestic sewage leads to the death of fish and aquatic animals.

You may have studied environmental issues in your previous classes. Brush up concepts such as global warming with TopperLearning’s CBSE Class 12 Science Biology Environmental Issues notes. As per the CBSE Class 12 syllabus, this chapter also teaches you about Eutrophication, Biomagnification, and other important concepts. Revise lessons on the prevention of environmental issues such as deforestation, pollution, etc. by referring to our CBSE Class 12 Biology e-learning resources.

CBSE Class 12 Science Biology: Textbook Solutions, Videos, Sample Papers and 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

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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

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