ISC Class 12 Biology Weightage 2025: Unit and chapter-wise marks distribution

Updated On: December 13, 2024 09:01 AM

Across all units and chapters, ISC Class 12 Biology Weightage 2025 for the CISCE 2025 board exam theory paper is provided here. Biology exam will be held on March 21.

ISC Class 12 Biology Weightage 2025

ISC Class 12 Biology Weightage 2025: Council for the Indian School Certificate Examinations (CISCE) releases the unit and chapter-wise marks distribution for the Class 12 Biology Weightage for the 2025-2026 academic session. Students and educators can now review the unit and chapter-wise weightage to better strategize their studies, focusing on areas with higher marks allocation. The ISC Class 12 Biology 2025 Syllabus focuses on building strong reading, writing, listening, and speaking skills. All the aspirants who have opted for Biology as one of their core subjects can check the detailed and complete ISC Class 12th Biology Weightage 2025 here.

ISC Class 12 Biology Weightage 2025 Chapter-Wise

The total marks distribution for all units and their respective chapters is as follows:

Unit Name	Chapter Name	Total Weightage without options	Total Weightage with options
Unit 1: Reproduction	Sexual reproduction in flowering plants	6 marks	9 marks
	Human Reproduction	5 marks	7 marks
	Reproductive Health	5 marks	7 marks
	Total	16 marks	23 marks
Unit 2: Genetics and Evolution	Principles of inheritance and variation	5 marks	7 marks
	Molecular basis of Inheritance	4 marks	6 marks
	Evolution	6 marks	9 marks
	Total	15 marks	22 marks
Unit 3: Biology and Human Welfare	Human Health and Diseases	8 marks	11 marks
	Microbes in Human Welfare	6 marks	8 marks
	Total	14 marks	19 marks
Unit 4: Biotechnology and its Applications	Biotechnology - Principles and processes	5 marks	7 marks
	Biotechnology and its applications	5 marks	8 marks
	Total	10 marks	15 marks
Unit 5: Ecology and Environment	Organisms and Populations	6 marks	8 marks
	Ecosystem	4 marks	6 marks
	Biodiversity and its Conservation	5 marks	7 marks
	Total	15 marks	21 marks

ISC Class 12 Biology 2025 Project Work Evaluation Criteria

Check the evaluation criteria for ISC Class 12 Biology, in the table below:

Assessment Type	Marks
Project Work Content Introduction Presentation (graphs, tables, charts, newspaper cuttings, diagrams, photographs, statistical analysis if relevant) Conclusion/ Summary Bibliography	10 marks
Practical File Each practical done in the academic year must be recorded in the practical file All the practicals must be checked, signed, and dated by the subject teacher	5 marks

Assessment Type

Marks

Project Work

Content
Introduction
Presentation (graphs, tables, charts, newspaper cuttings, diagrams, photographs, statistical analysis if relevant)
Conclusion/ Summary
Bibliography

10 marks

Practical File

Each practical done in the academic year must be recorded in the practical file
All the practicals must be checked, signed, and dated by the subject teacher

5 marks

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