HBSE 12th Biology Deleted Syllabus 2026: Get to Know Chapter Wise Deleted Syllabus 

Abhishek Joshi

Updated on - Jul 18, 2025

To reduce the syllabus-based burden, the Haryana Board of School Education has deleted certain topics from the 12th-class Biology syllabus. The HBSE 12th Biology Deleted Syllabus comes with a motive to simplify the curriculum. It will also promote conceptual understanding of the fundamental topics in Biology. Thus, if you are preparing for the HBSE 12th Exam 2026 then make sure to follow the fresh syllabus pattern only. 

The HBSE 12th Deleted Syllabus will surely help in improving your marks. There were lots of overlapping concepts and unnecessary sections. Now, the fresh syllabus has become easy. You will get more time for practicing and revising. The board authorities have decided to drop the outdated nature of the syllabus from HBSE 12th Deleted Syllabus 2026. You will also get some extra time to get ready for the exams like NEET. Thus, the shortened syllabus will prove to be highly advantageous. 

This article covers all the main features of the HBSE 12th Biology Deleted Syllabus. Hence, if you are a 12th HBSE Science student then carefully go through the upcoming details.  

Also Read: HBSE 12th Syllabus 2026

HBSE 12th Biology Deleted Syllabus 2026 

Once you gain knowledge about the precise HBSE 12th Biology Deleted Syllabus then you can draft an appropriate study plan. The table shared here will help you to understand the chapter-wise deleted topics in Biology. Here is an idea about the reduced syllabus - 

Chapters 

Deleted Topics 

Reproduction in Organisms 

Complete chapter removed 

Strategies for enhancement in food production

Complete chapter removed 

Environmental issues  

Complete chapter removed 

Organisms and populations  

Organism and its environment, major abiotic factors, responses to abiotic factors, and adaptations

Ecosystem 

Ecological succession, succession of plants, nutrient cycling, carbon cycle, phosphorus cycle, and ecosystem services. 

Also Read: HBSE 12th Admit Card

How to get the HBSE 12th Biology Syllabus 2026 PDF? 

You must always prioritize using an updated syllabus for the HBSE 12th Biology. The table below provides the updated syllabus for HBSE 12th Biology. Check out the link -  

HBSE 12th Biology Syllabus 2026 – Download PDF 

Also Read: HBSE 12th Sample Papers 

What is the Exact HBSE 12th Biology Question Paper Pattern 2026?

The HBSE 12th Biology theory question paper will comprise of 70 marks. There will be 5 sections namely A, B, C, D, and E. You will be given 3 hours to solve the question paper. The practical assessment will carry 30 marks (internal assessment will carry 15 marks and external assessment will also carry 15 marks). Hence, on a whole, the  weightage of the HBSE 12th Biology exam will be 100 marks. The paper will be a mix of diverse kind of questions. The table below will help you to understand the exact HBSE 12th Biology theory question paper pattern - 

Section

Number of Questions

Marks Allotted 

A

18 questions 

(MCQs)

18 x 1 = 18

B

7 questions 

(very short type)

7 x 2 = 14 

C

5 questions 

(short type)

5 x 3 = 15

D

2 questions 

(case-based questions)

2 x 4 = 8

E

3 questions 

(long type)

3 x 5 = 15 

Total 

 

70 marks 

Also Read: HBSE 12th Previous Year Question Papers 

HBSE 12th Biology Topics Weightage 2026 

You must always understand the weightage of important topics before starting your preparation journey for any subject. With the help of the weightage pattern, you can allocate the right amount of time to a specific area. Here is the topic-wise weightage analysis for the HBSE 12th Biology - 

Topics

Weightage 

Reproduction – sexual reproduction in flowering plants, reproductive health, human reproduction, etc. 

16%

Genetics and evolution – molecular basis of inheritance, principles of inheritance & variation, evolution, etc. 

20%

Biology in human welfare – microbes in human welfare, human health & diseases, etc. 

12%

Biotechnology – biotechnology & its applications,  principles and processes of biotechnology,etc. 

12%

Ecology – organisms and populations, ecosystem, biodiversity, & its conservation, etc. 

10%

Practical Assessment 

30%

These percentages  are the near about values based on the recent HBSE 12th Biology syllabus pattern. If you need the  fresh information  about the weightage, updated syllabus, or deleted syllabus, you must visit the  website of the board at bseh.org.in. 

Also Read: HBSE 12th Exam Preparation Tips 

Benefits of the HBSE 12th Biology Deleted Syllabus 2026

Here is a discussion about the numerous benefits of the HBSE 12th Biology Deleted Syllabus –

  • HBSE 12th Biology is an elaborate subject and the removal of certain chapters and topics will surely help you to create a rational study plan. 

  • Because of the HBSE 12th Biology Deleted Syllabus, your anxiety will come down. 

  • You will get some extra time for revision and you can also use this time to prepare for the NEET exam. 

  • Surely, your conceptual understanding of the subject of Biology will improve. It will enhance your confidence from an exam point of view.

  • When you are working on the past years’ HBSE 12th Biology papers, you can leave out the  questions from the deleted syllabus. 

For more informative updates about the HBSE 12th Exam, follow Getmyuni! 

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