Class 12 NCERT Solutions for Biology

NCERT Solutions for Class 12 Biology: There are times when biology can be easy, but it can also be tough. Schools that follow the CBSE curriculum have been set by the national council of education and training (NCERT). To help students answer questions correctly, NCERT solutions are provided below, using a logical approach and methodology. With the solutions, students can gain a good understanding of the fundamentals of the subject.

School and board examinations are prepared using NCERT textbooks, which are recommended by CBSE. Other refreshers are not required, as the textbooks are considered sufficient. We have designed the solutions based on the language and simplicity of the explanations in the NCERT textbooks. It is well known that NCERT textbooks play an important role in the JEE and NEET examinations as well.

There are solved answers for all the chapters, exercise-by-exercise, in the Class 12 NCERT Solutions for Physics. Class 12 students will find this material useful as they prepare for their exams. NCERT syllabus and curriculum are followed in the development of the solutions here. By using our expertise, we prepare these materials with the intent of teaching at a level students can understand. We provide 12th-grade students with answers to all their questions to clarify their doubts.

NCERT textbooks are formulated by the CBSE board. Due to this, all students studying under this board have access to the finest solution materials. As the level of education increases in this class, it is also an imperative class for students. The primary subjects at this level are either Math or Biology, and Biology and Chemistry are shared. This is the beginning of a student’s future education and career, so they need to be more focused on their studies. As a result, students can really score well in their final exams when they use these solutions.

The solutions to all the chapters in the Biology subject for Class 12 have been organized properly. Students can easily find answers to any question that is mentioned in the textbook here. These answers are in accordance with the 2022-2023 syllabus .So students need not worry about the information in the solutions. We are able to offer them well-prepared and structured solutions

Class 12 NCERT Solutions for Biology

This page contains the NCERT solutions for all the chapters of the Class 12 Biology subject. In order to find solutions to each chapter, students can click on the links below. The questions here are answered in accordance with the textbook’s method and procedures. Here are the PDF files for all the chapters, which students can download and study offline.

Class 12 NCERT Solutions for Biology

  • An overview of 1 Chapter- Reproduction in Organisms
  • An overview of 2 Chapter- Sexual Reproduction in Flowering Plants
  • An overview of 3 Chapter-Human Reproduction
  • An overview of 4 Chapter-Reproductive Health
  • An overview of 5 Chapter-Principles of Inheritance and Variation
  • An overview of 6 Chapter-Molecular Basis of Inheritance
  • An overview of 7 Chapter-Evolution
  • An overview of 8 Chapter-Human Health and Disease
  • An overview of 9 Chapter-Strategies for Enhancement in Food Production
  • An overview of 10 Chapter-Microbes in Human Welfare
  • An overview of 11 Chapter-Bio Technology: Principles And Processes
  • An overview of 12 Chapter-Biotechnology and its Applications
  • An overview of 13 Chapter-Organisms and Populations
  • An overview of 14 Chapter-Ecosystem
  • An overview of 15 Chapter- Biodiversity and Conservation
  • An overview of 16 Chapter-Environmental Issues

There is not an easy way to answer the questions in the textbooks. Solving those problems requires mathematical and logical skills. The 12th-grade Biology curriculum covers a large variety of topics. These topics will also be covered in higher education, such as in Class 12th.

Why Learnworld is a better option for solving NCERT solutions for Class 12 Biology

  •  This page provides clear and concise NCERT Textbook Solutions for Macro Economics.
  • Students can easily comprehend the books of Class 12 NCERT Solutions for Biology in easily understandable language. 
  • Everyone has access to it at anytime and anywhere without any difficulty.
  • Students will definitely score better marks in the examination if they master these solutions based on the NCERT (CBSE) Syllabus and Books.
  • Class 12 NCERT Solutions for Biology are provided on this page with no additional fee. 


How to excel in Class 12 Biology?

Use the latest Class 12 NCERT Solutions for Biology Books if you’re looking for tips and tricks to master class 12 Biology. Just referring to the CBSE NCERT textbook is sufficient for Class 12 NCERT Solutions Biology.

Why NCERT solutions for class 12 Macro Economics are relevant?

Each NCERT Solution is designed so that every student can readily grasp the concept in their minds and can clear all their doubts within a few seconds. With the help of this self-explanatory book, students will be able to innovate and explore Biology. Students can also assess their learning abilities by using the Class 12 NCERT Solutions for Biology for board exams.

How to download CBSE Class 12 NCERT Solutions for Biology in PDF format?

Study materials for all subjects of CBSE Class 12 NCERT Solutions for Biology can be downloaded here in PDF format. It is easy for students to download and use these materials offline. As per the latest CBSE syllabus 2022-23, Learnworld provides NCERT solutions, revision notes, syllabus, sample papers, previous year question papers and important questions for Class 12 NCERT Solutions for Biology. Our teachers have designed all these materials based on their expertise and experience. 

Which Guide is considered to be best for Class 12 Biology?

Class 12 NCERT is considered to be the best guide for studying Class 12.

Chapter 1 of Class 12 Biology: Reproduction in Organisms

We will study about the various forms, modes, and processes of reproduction in this chapter.

Asexual reproduction, sexual reproduction, pre-fertilization events, fertilisation, and post-fertilization events are the subtopics covered in this chapter. Additionally, there are well-illustrated graphics that make studying simple for the students and aid in their comprehensive comprehension of the subject.

Class 12 Biology Chapter 2 Sexual Reproduction in Flowering Plants

Second Sexual Reproduction in Flowering Plants in Class 12 Biology .This chapter, which combines four chapters, is worth fourteen marks on the board exam for students in grades 12 and 13. The morphology, structure, and method of sexual reproduction in flowering plants will all be covered in this chapter. Pre-fertilization events, double fertilisation, post-fertilization events, and understanding of apomixis and polyembryony are other subtopics presented in this chapter.

Class 12 Biology Chapter 3 Human Reproduction

The human male and female reproductive systems are covered in this chapter. This chapter is thorough and simple to understand thanks to the use of images, flowcharts, diagrams, and simple language. Additionally, the themes’ sequential progression aids in greater retention and understanding.

The related subjects covered in this chapter include:

  • Reproductive structures,
  • Male reproductive systems,
  • Female reproductive systems,
  • The role of sex hormones,
  • Gametogenesis,
  • Spermatogenesis and more introductory topics of human reproduction.

Class 12 Biology Chapter 4 Reproductive Health

The relevance of reproductive health and the means of achieving it are the main topics of this chapter. The health of the mother and the child before, during, and after pregnancy is also a major topic in this chapter. Other subjects treated here include amniocentesis, maternal mortality, and infant mortality.

This chapter’s subtopics include the following:

  • Reproductive Health – Problems and Strategies
  • Population Explosion and Birth Control
  • Medical Termination of Pregnancy
  • Sexually Transmitted Diseases
  • Infertility.

Class 12 Biology Chapter 5 Principles of Inheritance and Variation

Genetics and evolution are essentially at the core of everything. In this chapter, we talk about how the parents’ and the children’s traits differ and overlap. The key subjects covered here include Mendel’s law of heredity, the inheritance of one gene, the inheritance of two genes, sex determination, mutations, and genetic illnesses. This chapter is thorough and simple to understand thanks to the use of images, flowcharts, diagrams, and simple language. Additionally, the topics’ sequential progression aids in greater retention and understanding.

Class 12 Biology Chapter 6 Molecular Basis of Inheritance

To help readers grasp all of the architecture of DNA, RNA, and the replication process, etc., this chapter provides incredibly simplified pictures. This chapter’s subjects include:

• Polynucleotide chain structure and DNA helix packaging in the DNA.

• DNA is the genetic material, and it has certain characteristics, according to the search for genetic material.

• The RNA world.

• Replication: The machinery, enzymes, and experimental confirmation.

• The transcription unit, the transcription unit and the gene, the many types of RNA, and the transcription process.

• Genetic code: t RNA, genetic code, and mutations.


control of gene expression.

• Lac Operon

  • Human genome project: Salient

Class 12 Biology Chapter 7 Evolution

The study of the evolution of life forms on earth is known as evolution biology. In the framework of Earth’s evolution and against the backdrop of the universe’s own evolution, this chapter discusses the beginning of life and the evolution of life forms or biodiversity on planet Earth. This chapter is thorough and simple to understand thanks to the use of images, flowcharts, diagrams, and simple language. Additionally, the themes’ sequential progression aids in greater retention and understanding.

Class 12 Biology Chapter 8 Health and Diseases

This chapter covers health, maintaining optimal health, diseases, types, treatments, and prevention, immunity, its types, and addresses some diseases like AIDS, cancer, and adolescent problems.

This chapter’s subtopics include:

  • Common Diseases in Humans
  • Immunity
  • AIDS
  • Cancer
  • Drugs and Alcohol Abuse.

Class 12 Biology Chapter 9 Strategies for Enhancement in Food Production

In order to boost food production, biological principles that are used in plant and animal breeding are discussed in this chapter. This chapter discusses a number of novel methods, including tissue culture and embryo transfer technologies, which are essential to boosting food production.

Class 12 Biology Chapter 10 Microbes in Human Welfare

Due to the fact that they can only be seen under a microscope, microbes are also known as micro-organisms or microscopic organisms. They are small, living things that are invisible to the unaided eye and are everywhere around us—in the soil, water, and air, for example. They were essential to the evolution of the earth. A few microorganisms can cause serious illnesses and infections that can even be fatal, while others are helpful and safe for our health. Pathogens are bacteria that cause disease. Some of the most well-known diseases brought on by these bacteria are HIV, cholera, polio, TB, influenza, and tuberculosis. Bacteria, protozoa, viroids, certain algae, fungi, and viruses are the most prevalent microorganisms.

Class 12 Biology Chapter 11 Biotechnology Principles and Processes

Biotechnology is described as “the integration of natural science and organisms, cells, components thereof, and molecular analogues for products and services” by the European Federation of Biotechnology. This chapter covers an in-depth analysis of the biotechnology-related principles and procedures.

The following two fundamental approaches are the foundation of modern biotechnology, among other techniques.

It is they-

• Genetic modification

• Production of drugs, antibiotics, and vaccines

Class 12 Biology Chapter 12 Biotechnology and its Application

Students will discover in this chapter how biotechnology has been used by people to enhance their quality of life, particularly in the areas of food production and health. By utilising bacteria, plants, animals, and their metabolic systems, biotechnology has provided humans with a number of beneficial items.

Class 12 Biology Chapter 13 Organisms and Populations

Students will study ecology at the population and organismal levels in this chapter. Topics covered in this chapter include organisms and their environments, niches, and significant abiotic factors like as temperature, water, light, soil, as well as organisms’ reactions to abiotic factors like regulation, conformation, migration, and suspension. This chapter is thorough and simple to understand thanks to the use of images, flowcharts, diagrams, and simple language. Additionally, the themes’ sequential progression aids in greater retention and understanding.

Class 12 Biology Chapter 14 Ecosystem

An ecosystem can be thought of as a functional unit of nature where living things interact both with one another and with the physical world around them In order to understand the intake (productivity), energy transfer (food chain), and output of an ecosystem, students will first study about the structure of the ecosystem in this chapter.

Class 12 Biology Chapter 15 Biodiversity and its Conservation

Students will study about the significance of biodiversity, including its types, patterns, evolution, degradation, and conservation, in this chapter. This chapter covers a variety of subjects, including genetic diversity, species diversity, latitudinal gradients, species area relationships, causes of biodiversity losses, in-situ conservation, and ex-situ conservation.

Class 12 Biology Chapter 16 Environmental Issues

This chapter discusses the issues that pose a threat to the ecological balance of the natural world, such as pollution, global warming, deforestation, etc., as well as the steps that have been done to address these issues. The impacts of pollution on human life and how it affects people’s daily lives are also covered in this chapter.

The answers are promised to be clear and free of mistakes. It is suggested that the students use these real solutions in comparison to the other refresher books. The most reliable source of knowledge in the school curriculum is the NCERT textbooks, which are required by CBSE.

 All students know that the 12th grade is the most significant class for them, as it marks the beginning of their college careers. It is only when you have scored at least the minimum qualifying marks that you can get admission into a well recognized institute or university. There are no other options if you want to get a good job or are recruited directly by colleges. It is crucial that you build a strong foundation in Class 12 Biology and gain a thorough understanding of the concepts.

Here, we provide Class 12 NCERT Solutions for Biology with solutions to all their questions, so that their doubts can be clarified. All the chapter introductions and links for the exercises are provided below. Please read them carefully.


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