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CBSE Class 12 Biology Deleted Syllabus 2025-26: The National Education Policy 2020 emphasizes the promotion of practical learning over rote learning. CBSE has eliminated the chapters including “Reproduction in Organisms”, “Strategies for Enhancement in Food Production”, and “Environmental Issues” as the content has become outdated. In total, there are 5 units and 13 chapters that are removed from the CBSE Class 12 Biology Syllabus 2025-26 . This makes the learning experience more interesting and relevant. The changes are introduced to lessen the burden on students. Check out the tables given below in the article to check the CBSE Class 12 Biology Deleted Syllabus 2025-26 in detail.
CBSE Class 12 Biology Deleted Syllabus 2025-26
The following table includes the chapters deleted from class 12 biology. You can leave these topics and focus on the updated syllabus.
Unit & Chapter | Deleted Topic |
|---|---|
Unit-VI Reproduction Chapter-1: Reproduction in Organisms | (whole chapter deleted) |
Unit-VIII Biology and Human Welfare Chapter-9: Strategies for Enhancement in Food Production | (whole chapter deleted) |
Unit-X Ecology and Environment Chapter-13: Organisms and Populations | Organism and its Environment, Major Abiotic Factors, Responses to Abiotic Factors, Adaptations |
Unit-X Ecology and Environment Chapter-14: Ecosystem | Ecological Succession and Nutrient Cycles |
PRACTICALS A. List of Experiments | 2. Collect and study soil from at least two different sites and study them for texture, moisture content, pH and water holding capacity. Correlate with the kinds of plants found in them. 3. Collect water from two different water bodies around you and study them for pH, clarity, and presence of any living organism. 4. Study the presence of suspended particulate matter in air at two widely different sites. 8. Study the effect of different temperatures and three different pH on the activity of salivary amylase on starch. |
PRACTICALS B. Study/observation of the following (Spotting) | 10. Two plants and two animals (models/virtual images) found in xeric conditions. Comment upon their morphological adaptations. 11. Two plants and two animals (models/virtual images) found in aquatic conditions. Comment upon their morphological adaptations. |
Also Read: CBSE Class 12 Biology Sample Paper 2025-26
CBSE Class 12 Biology Syllabus 2025-26
Check out the table below to know the topics included in the syllabus. Biology is divided into theory and practical. The theory exam is conducted for 70 marks, and the practical is 30 marks. The following table includes the list of chapters included in the syllabus.
Unit | Title |
|---|---|
Unit VI - Reproduction | Chapter 2: Sexual Reproduction in Flowering Plants Chapter 3: Human ReproductionChapter 4: Reproductive Health |
Unit VII - Genetics and Evolution | Chapter 6: Molecular Basis of Inheritance Chapter 7: Evolution |
Unit-VIII - Biology and Human Welfare | Chapter 8: Human Health and Diseases Chapter 10: Microbes in Human Welfare |
Unit-IX - Biotechnology and its Applications |
Chapter 11: Biotechnology – Principles and Processes
|
Unit X - Ecology and Environment | Chapter 14: Ecosystem Chapter 15: Biodiversity and its Conservation |
Download: CBSE Class 12 Biology Previous Year Question Paper
CBSE Class 12 Biology Preparation Tips 2026
You can perform well in the final exams by going through the tips given here. These tips help you understand well and perform your best in exams.
- Prepare a schedule to cover all the topics included in the syllabus.
- Divide the syllabus into smaller units and set a time limit to complete each topic.
- Set a daily target and ensure you complete the desired syllabus in a day.
- Try to complete the syllabus in advance and keep some time for revision.
- While studying the syllabus, make handwritten notes that can be used when revising the syllabus.
- Solve the CBSE Class 12 Biology Important Questions 2025-26 after completing the syllabus. Check your preparation level and focus on the topics in which you are weak.
Reasons Behind CBSE Class 12 Biology Deleted Syllabus 2025-26
- In 2020, the NCERT initiated significant changes to biology textbooks, with a particular focus on the deleted syllabus of Biology Class 12.
- These changes were driven by the National Education Policy (NEP) 2020, which aims to modernize and enhance the learning experience.
- NEP 2020 prioritizes experiential learning over rote memory by decreasing curriculum content to increase flexibility and foster constructive learning.
- The main goal is to encourage practical and hands-on learning while reducing the amount of work that students must do in the classroom.
- The criteria for rationalizing content were presented by Union Minister of State for Education Annapurna Devi. These included considerations for content overlap, repetition, difficulty level, accessibility for self-learning, relevance, and alignment with learning outcomes.
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FAQs
To score good marks in the CBSE class 12 Biology exam, students can complete the syllabus in advance and solve the previous year question papers.
Students can visit the official website of the CBSE at https://cbseacademic.nic.in/ to download the CBSE class 12 Biology Syllabus PDF to get the names of chapters deleted from class 12 biology.
CBSE class 12 Biology practical exam will be of 30 marks.
In the CBSE class 12 Biology theory exam, students must write answers for 70 marks.
In the CBSE Class 12 Biology Syllabus 2025-26, there are 5 units in total.
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