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NIOS Class 12 Biology Syllabus 2026

Explore the latest syllabus, chapters and topics for NIOS Class 12 Biology.

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Prepare for the NIOS Class 12 Biology examination with our complete chapter-wise syllabus. The NIOS Biology syllabus for Class 12 includes 31 chapters such as Origin and Evolution of Life and Introduction to Classification, The Kingdom Monera, Protoctista and Fungi, Kingdom Plantae and Animalia, Cell Structure and Function, and more. This detailed syllabus guide is... Prepare for the NIOS Class 12 Biology examination with our complete chapter-wise syllabus. The NIOS Biology syllabus for Class 12 includes 31 chapters such as Origin and Evolution of Life and Introduction to Classification, The Kingdom Monera, Protoctista and Fungi, Kingdom Plantae and Animalia, Cell Structure and Function, and more. This detailed syllabus guide is ideal for students, teachers and parents who want to understand the exact units and lessons required for the academic session. Studying the NIOS Class 12 Biology syllabus chapter by chapter helps you plan your preparation, manage your time effectively and score well in the board examinations. Refer to the official NIOS website for the latest and updated Biology syllabus and exam pattern.

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Chapter List & Curriculum

Complete units and chapters prescribed for NIOS Class 12 Biology.

Unit / No.	Chapter / Topic Title	Practice Test
Ch 1	Origin and Evolution of Life and Introduction to Classification	Take Test
Ch 2	The Kingdom Monera, Protoctista and Fungi	Take Test
Ch 3	Kingdom Plantae and Animalia	Take Test
Ch 4	Cell Structure and Function	Take Test
Ch 5	Tissues and other Level of Organization	Take Test
Ch 6	Root System	Take Test
Ch 7	Shoot System	Take Test
Ch 8	Absorption, Transport and Water Loss in Plants	Take Test
Ch 9	Nutrition in Plants - Mineral Nutrition	Take Test
Ch 10	Nitrogen Metabolism	Take Test
Ch 11	Photosynthesis	Take Test
Ch 12	Respiration in Plants	Take Test
Ch 13	Nutrition and Digestion	Take Test
Ch 14	Respiration and Elimination of Nitrogenous Wastes	Take Test
Ch 15	Circulation of Body Fluids	Take Test
Ch 16	Locomotion and Movement	Take Test
Ch 17	Coordination and Control - The Nervous and Endocrine Systems	Take Test
Ch 18	Homeostasis: The Steady State	Take Test
Ch 19	Reproduction in Plants	Take Test
Ch 20	Growth and Development in Plants	Take Test
Ch 21	Reproduction and Population Control	Take Test
Ch 22	Principles of Genetics	Take Test
Ch 23	Molecular Inheritance and Gene Expression	Take Test
Ch 24	Genetics and Society	Take Test
Ch 25	Principles of Ecology	Take Test
Ch 26	Conservation and Use of Natural Resources	Take Test
Ch 27	Pollution	Take Test
Ch 28	Nutrition and Health	Take Test
Ch 29	Some Common Human Diseases	Take Test
Ch 30	Biotechnology	Take Test
Ch 31	Immunobiology: An Introduction	Take Test

NIOS Class 12 Biology — Complete Curriculum Overview

The NIOS Class 12 Biology curriculum is structured to build strong conceptual foundations and analytical skills for students. By thoroughly reviewing this syllabus, students gain clarity on theoretical principles, numerical applications, and exam-focused problem sets.

Key Academic Objectives & Exam Strategy

Unit-Wise Mastery: Focus on understanding core definitions, formulas, and derivations before advancing to complex multi-step problems.
Assessment Format: The annual examination incorporates a balanced mix of objective MCQs (20%), short answer questions (40%), and descriptive long answer evaluations (40%).
Time Management: Allocate regular weekly revision hours for high-weightage chapters and solve timed chapter-wise CBT tests on Target Exams.

100% Free Practice Chapter-Wise MCQs Timed CBT Mode

AI-Powered Study Framework

AI-Assisted Learning for NIOS Class 12 Students

Education is changing rapidly. Students no longer have to depend only on textbooks, static notes, and fixed schedules. With AI-assisted personalized learning, NIOS students can identify exactly where they struggle, master difficult concepts at their own pace, and know what to study next.

Your 24×7 Study Friend

Stuck on a concept late at night? Get instant, simpler step-by-step explanations anytime without hesitation.

Weak Chapter Detection

Pinpoints exact concepts where marks are lost rather than just showing a general test score.

"What Should I Study Next?"

Actionable recommendations guide your daily revision hours to the highest-priority topics.

The Continuous Smart Learning Cycle

1. Explore Syllabus 2. Study Chapter 3. Attempt Test 4. Detect Weak Areas 5. AI Concept Revision 6. Master & Improve

How AI Detects Your Weak Chapters

One of the biggest hurdles students face is not knowing exactly where they are losing marks. A student might say: “I am weak in Science.” But that information is too broad. The actual problem is typically concentrated in two or three chapters, or particular numerical problems within those chapters.

Performance-Based AI Analysis for NIOS Class 12

Core Concepts 86%

Formulas & Rules 78%

Coordinate Units 72%

Weak Area Alert 48%

Smart Next Action: “Your accuracy in foundational concepts is high, but application questions scored 48%. Revise the key chapter formulas and re-attempt the practice test before moving to the next unit.”

From Marks to Meaningful Learning Insights

Traditional tests end with a raw score (e.g. 11/15 or 73%). Students need to know: Why did I lose those marks? Were they conceptual mistakes, calculation slips, or repeated trap options?

Strong Area: Fundamental Definitions & Theoretical Rules Needs Focus: Application-Based Numericals & Multi-step Problems Suggested Action: Review Step-by-Step Solutions & Retake Chapter Quiz

AI + Teacher + Textbook + Practice: The Optimal Combination

AI does not replace traditional education—it strengthens it. The highest-performing students combine the unique advantages of all learning resources:

Teacher Core academic guidance, mentorship, and deep subject mastery.

Textbook Prescribed NIOS curriculum & authoritative theory.

Practice Tests Timed self-assessment, speed building, and error elimination.

AI Assistant 24×7 personalized explanations, simpler analogies & weak area detection.

Frequently Asked Questions

The NIOS Class 12 Biology syllabus covers all officially prescribed units, chapters, theoretical concepts, practical exercises, and project requirements designed according to the latest academic session curriculum.

There are 31 key chapters and units included in the NIOS Class 12 Biology curriculum as outlined in the chapter table above.

The examination typically comprises 70 to 80 marks for the written annual theory paper (covering objective MCQs, short answer questions, and long descriptive problems) and 20 to 30 marks for internal assessments, projects, and practical evaluations.

Target Exams provides free chapter-wise CBT online tests and mock papers for NIOS Class 12 Biology with instant scoring, real-time timer countdowns, and detailed step-by-step solutions.

Yes, our syllabus breakdown is regularly synchronized with the latest rationalized guidelines and curriculum circulars released by NIOS.