NCERT solutions for class 12 biology - If you are preparing for class 12th board exams, then you will find solutions of NCERT class 12 biology very beneficial for your preparation. Biology as a subject, in essence, can be taken as the tale of different life forms that exist today or may have existed in the past. In the NCERT class 12 textbook of biology, you will learn about human and plant reproductive biology on one hand while evolutionary biology on others. CBSE NCERT solutions for class 12 biology will make it easy for you to learn it in depth. You will also gain knowledge on how the different traits in parents are transmitted to their children in genetics and how the different units of the environment are interlinked with each other in ecology. However, all will be to your advantage only if you score as well in your exams and this is where NCERT solutions will help you not just with NCERT solutions for class biology but other subjects as well.
Overall class 12 biology is an amalgamation of botany, zoology and the applications of biology, which can be researched and studied extensively if you wish to study biology or related streams in your future. From the exam point of view, studying the CBSE NCERT solutions for class 12 biology will help you to excel in your board exams. If you are planning to appear for NEET, AFMC or any other medical entrance exams, then solutions for NCERT class 12 biology will another good tool for your preparation.
NCERT textbook of class 12 biology includes a total of 16 chapters segregated into 5 units namely, reproduction, genetics, and evolution, biology in human welfare, biotechnology, and ecology. After studying the solutions for NCERT class 12 biology, you will be able to solve different practice questions asked in the textbook. It is prudent to start solving the NCERT exercise for class 12 biology, after a thorough reading of the chapters of NCERT class 12 biology.
Solving NCERT exercise is an important prerequisite if you wish to score well in your board exams. So biology notes for each chapter with the CBSE NCERT solutions for class 12 biology will be a very good weapon to combat the exam blues and crack the board exams. Once you are done with the NCERT solutions for class 12 biology, you will find that your understanding of concepts will also be useful in NEET and other exams. The brief analysis of all the 16 chapters of NCERT biology of class 12 is given below:
Reproduction in organisms is the first chapter of NCERT textbook of class 12 biology. This chapter mainly deals with the methods of reproduction in a different organism. Here, you will study two types of reproduction methods that are sexual reproduction and asexual reproduction. At the end of the chapter, the an exercise is given with a total of 18 questions. The solutions for these are given in this article.
The second chapter is sexual reproduction in flowering plants. You will learn about sexual reproduction in angiosperm plants. The chapter has a total of five subtopics. Different phases of fertilization will also be covered here. The questions to test your knowledge are given in the exercise at the end of the chapter.
Human reproduction is the topic in the third chapter which explains the process of sexual reproduction in humans. In this chapter, you will become familiar with the male and female reproductive systems of humans. and also study the menstrual cycle and different stages of pregnancy. The NCERT exercises given in chapter 3 consists of a total of 21 questions. If you are able to write correct solutions for NCERT class 12 biology, then surely you can excel in CBSE board exams.
The fourth chapter is reproductive health and this chapter deals with all the reproduction-related health aspects in humans. A total of five sub-topics are taught based on which 12 questions are asked at the end of the chapter. In this chapter, you will study a few important topics like birth control, sexually transmitted disease and solution of infertility. You must practice the questions mentioned in the NCERT book while preparing for the 12th board exam. CBSE NCERT solutions for class 12 biology will also help you out with the correct answers.
Principles of inheritance and variation is the first chapter of the second unit of NCERT textbook class 12 biology. In this chapter, you will get to know about the various principles and phenomena that control the expression of different characters in organisms. At the end of this chapter, you will find 16 questions based on the topics taught. Before attempting board exams, you must practice these NCERT questions because practice will make you perfect.
Molecular basis of inheritance is the topic dealt in this lesson. In addition, you will study processes like DNA replication, transcription and translation. You will also study about the genetic code and new areas of research such as DNA fingerprinting and human genome project. Solve NCERT exercise which consists of around 14 questions and write the correct solutions of NCERT class 12 biology in your board exams.
The chapter evolution of class 12 biology deals with evolutionary science. In this chapter, you will study the theories, and evidence suggesting evolution. You will also learn the mechanisms that cause an evolution in nature. This chapter will tell you about the adaptive radiation and biological evolution and its mechanism. In the end, you will gain knowledge about how humans evolved. The 10 questions given at the end of the chapter, must be tried in order to get an understanding of all the concepts.
This chapter deals with the principles of plant and animal breeding. It also makes you familiar with different types of high yielding varieties of plants. You will also learn important topics like plant breeding, tissue culture and different techniques that are involved in this. In the end, you will be required to answer the NCERT exercise which has 15 questions. For a basic understanding of the chapters, you should attempt these questions and write correct solutions of NCERT class 12 biology chapter 9.
Here topics that your learn include details about the role of microorganisms for the benefits of humankind and uses of microorganisms in different areas for different purposes. For board exams and for exams like NEET, only NCERT of this chapter is enough. While preparing the chapter, read each and every line of the lesson and also solve the NCERT exercise given at the end to score well in your exams.
Chapter 11 is biotechnology: principles and processes deal with the recent area of research i.e. recombinant DNA technology. In this chapter, only an introduction to this technology is given, so you will study more about it in the future in higher classes. You will gain an awareness of the principles of biotechnology and its tools once you finish this lesson. The exercise given at the end of the chapter includes a total of 12 questions. After reading the chapter try answering all the questions. In case you are stuck, refer to the NCERT solutions for class 12 biology.
Here, you will learn about biotechnology, and its application as well as the various uses of biotechnology in the food industry, medicine industry etc. This chapter will introduce you to the transgenic animals as well as the ethical issues raised. After reading the chapter thoroughly go through the NCERT exercise and solve them on your own. If you need help to answer the questions, CBSE NCERT solutions for class 12 biology are the correct tools to use.
Characteristics of populations including population growth and population interactions are some topics dealt in this chapter. Other topics taught are ecological factors and how organisms get affected due to these. The NCERT exercise given at the end of the chapter has 17 questions. Refer to the CBSE NCERT solutions for class 12 biology given to answer them correctly.
In the chapter ecosystem, you will study the structures, functions and various components of the ecosystem. You will also get to learn about the ecosystem services, ecological succession, and biogeochemical cycles. This chapter will also tell you about the energy flow of the ecosystem with examples. Try the NCERT exercise to get clarity on all the concepts in your mind.
Chapter 15 compile the details of the diversity of life. In this chapter, you will learn the importance of biodiversity as there are three types of diversity: genetics, species and ecological. This chapter also includes the measures that are to be taken to conserve biodiversity. You must try NCERT exercise of chapter 15 biodiversity and its conservation. From the exam perspective, solutions of NCERT class 12 biology chapter 15 biodiversity and its conservation are beneficial.
1. Fill in the blanks:
(a) Humans reproduce _____________ (asexually/sexually)
(b) Humans are _____________ (oviparous, viviparous, ovoviviparous)
(c) Fertilisation is _____________ in humans (external/internal)
(d) Male and female gametes are _____________ (diploid/haploid)
(e) Zygote is _____________ (diploid/haploid)
(f) The process of release of ovum from a mature follicle is called _____________
(g) Ovulation is induced by a hormone called _____________
(h) The fusion of male and female gametes is called _____________
(i) Fertilisation takes place in _____________
(j) Zygote divides to form _____________which is implanted in uterus.
(k) The structure which provides vascular connection between foetus and uterus is called _____________
6. Why does ozone hole form over Antarctica? How will enhanced ultraviolet radiation affect us?
6. Depending upon the chemical nature of the template (DNA or RNA) and the nature of nucleic acids synthesised from it (DNA or RNA), list the types of nucleic acid polymerases.