NCERT Class 12 Biology Notes - Download Chapter wise PDF Notes

NCERT Class 12 Biology Notes are essential for students taking their boards and competitive exams like NEET. The notes include a short revision of the chapters, which makes it easy for students to easily and quickly grasp major concepts. The Biology notes for Class 12 are prepared by experts in the subject with short answers, diagrams, and important questions based on the NCERT book. The notes were made in a way that they would be more correct, thus students were able to concentrate on key points and gain confidence levels before exams.

This Story also Contains

1. Subject-wise Weightage for Class 12 Biology
2. Chapter-wise Biology Notes For Class 12
3. Chapter-wise Breakdown for Targeted Learning
4. Benefits of Using NCERT Class 12 Biology Notes

These explanations outline all the key chapters like reproduction, genetics, evolution, biotechnology, and ecology. These are perfect for last-minute revision as they summarize complex concepts into simple-to-grasp points. Students can revise key terms like Mendel's laws, DNA replication, immunity, and interaction with the environment without tension using these notes. The Class 12 biology revision notes can be downloaded, and the CBSE Class 12 biology notes PDF can be used offline. CBSE notes for Class 12 Biology are helpful for CBSE board exam preparation.

Subject-wise Weightage for Class 12 Biology

For Class 12 students, particularly those seeking to attempt board and competitive exams, knowledge of subject-wise weightage in Biology is more than important. It is a clear guide on how to prioritise topics, helping the student to better allocate time and effort. Those chapters with more marks need more focus, so that students are adequately prepared for questions that carry significant weight towards their total score.

By being aware of the distribution of weightage, students can minimise exam stress, plan revision effectively, and pay greater attention towards the clarity of concepts. This system enhances systematic learning and performance in both board and entrance exams, such as NEET.

Assessment Structure:

• Total Marks: 100

• Theory: 70 marks

Practical Examination: 30 marks

Passing Criteria:

• A student needs to secure a minimum of 33% in total, inclusive of:

• Minimum of 23 out of 70 in the theory exam

• At least 10 out of 30 in the practicals

Chapter-wise Biology Notes For Class 12

NCERT Class 12 Biology notes are provided for 16 chapters. Along with NCERT notes, students can use NCERT solutions to practice problems and CBSE previous year papers for board exam preparation.

The following are the links to download the PDF for all Chapters:

• Chapter 1 - Sexual Reproduction in Flowering Plants
• Chapter 2 - Human Reproduction
• Chapter 3 - Reproductive Health
• Chapter 4 - Principles of Inheritance and Variation
• Chapter 5 - Molecular Basis of Inheritance
• Chapter 6 - Evolution
• Chapter 7 - Human Health and Disease
• Chapter 8 - Microbes in Human Welfare
• Chapter 9 - Biotechnology: Principles and Processes
• Chapter 10 -Biotechnology and its Applications
• Chapter 11 - Organisms and Populations
• Chapter 12 - Ecosystem
• Chapter 13 - Biodiversity and Conservation

Subject Wise NCERT Exemplar

Chapter-wise Breakdown for Targeted Learning

The different chapters under the units are mentioned below:

Unit 1: Reproduction

Sexual Reproduction in Flowering Plants

• Anatomy of flowers, pollination mechanisms, and seed formation.

Human Reproduction

• Male and female reproductive systems, menstrual cycle, fertilization.

Reproductive Health

• Family planning methods, prevention of STIs.

Unit 2: Genetics and Evolution

Principles of Inheritance and Variation

• Mendelian inheritance, genetic disorders.

Molecular Basis of Inheritance

• DNA replication, protein synthesis.

Evolution

• Theories of evolution, human evolution.

Also Read:

Unit 3: Biology and Human Welfare

Human Health and Disease

• Types of diseases, immunity, and prevention strategies.

Microbes in Human Welfare

• Microbial applications in industry and sewage treatment.

Subject Wise NCERT Solution

Unit 4: Biotechnology

Biotechnology: Principles and Processes

• Recombinant DNA technology, ethical concerns.

Biotechnology and Its Applications

• Genetic engineering, GMOs.

Unit 5: Ecology

Organisms and Populations

• Population growth regulation, ecosystem structure.

Ecosystem

• Energy flow, nutrient cycling.

Biodiversity and Conservation

• Threats to biodiversity, conservation strategies.

Benefits of Using NCERT Class 12 Biology Notes

1. Effective Revision: Perfect for last-minute preparation with bullet points summarizing complex concepts.
2. Better Recall: Frequent use ensures improved memory recall
3. Exam Success: Helps students to attain high scores by highlighting important topics.

NCERT Class 12 Biology Notes are an essential resource for students aspiring to excel in their exams. With complete coverage, interactive features, and user-friendly design, these notes simplify learning while boosting confidence for both board exams and competitive tests like NEET.